Ingest two complete drawing sequences through 2026-09-14 16:35

Archive_Specifications.md

@@ -12,9 +12,9 @@ now distinguish the canonical workflows:
   established August 27, 2026.
 
 Protocol assignment is not a blanket finish-date cutover. In the current
-index, `standard-2026-08-27` applies only to the 186 `canonical_fragment`
-`record_id` values in the six dated relationship sidecars from August 27
-through September 2, 2026. Every other Standard row remains
+index, `standard-2026-08-27` applies only to the 218 `canonical_fragment`
+`record_id` values in the seven dated relationship sidecars from August 27
+through September 14, 2026. Every other Standard row remains
 `standard-2025-07-13`, including the 19 historical `RecNN` rows outside those
 sidecars. A `RecNN` filename suffix alone never assigns the prospective
 protocol.

CHANGELOG.md

@@ -2,6 +2,35 @@
 
 ## Unreleased
 
+### September 14 complete drawing-sequence ingestion
+
+- Added 32 creator-confirmed, unchanged canonical Framelapse source fragments
+  totaling 9,568,508,054 bytes and 1,859.281028 seconds of encoded playback.
+- Preserved two complete drawings as ordered `RecNN` source sequences containing
+  four and 28 canonical fragments. The creator-supplied group finish labels are
+  September 2, 2026 at 23:58 and September 14, 2026 at 16:35; they are not
+  individual fragment end times.
+- Increased active membership to 581 Standard plus 128 Pre-Standard records, or
+  709 total, without changing the 29-field schema or the 363 earlier-workflow
+  Standard rows.
+- Added a separate 32-row, 15-field September 14 relationship sidecar containing
+  two complete groups and no derivative rows. Prospective sidecar-defined
+  membership is now 218 canonical fragments across seven dated sidecars and 27
+  complete groups; timing v1 remains fixed at its historical 186-fragment scope.
+- Kept `original_filename` blank for the four sources that already bore their
+  canonical names and preserved the exact transferred source name for each of
+  the remaining 28 rows, including 27 literal `VID_*.mp4` names.
+- Verified 32/32 local SHA-256 values and complete packet-stream demuxes, 96/96
+  decoded start/middle/end frame samples, and 55,779/55,779 declared/countable
+  video frames. The literal container tag `com.android.capture.fps=5.000000` is
+  retained without inferring real drawing time.
+- Bound the 32 media objects at immutable media-only PR revision
+  `0ef0f61cd0c54232baa58774713d57168e5e90de`; the new relationship sidecar pins metadata-bearing
+  revision `db1d515c9626adf25207c2e844c913d74dba438f`.
+- Retained media-object-level `record_id` identity. This update does not add a
+  global `work_id`, alter the immutable v0.4.0 release receipt, expand timing-v1
+  coverage, or otherwise publish a new tagged release.
+
 ### Exploratory recording-timing sidecar
 
 - Added a revision-pinned, noncanonical timing layer for the 186 canonical

README.md

@@ -82,7 +82,7 @@ dataset_info:
     dtype: large_string
   splits:
   - name: archive
-    num_examples: 549
+    num_examples: 581
 - config_name: pre_standard
   features:
   - name: video
@@ -282,13 +282,13 @@ configs:
 
 # time-lapse-artifacts
 
-677 time-lapse recordings of one artist's traditional drawing practice across
-nearly two years (September 2024–September 2, 2026), with standardized acquisition
-since July 13, 2025. Across 2,083,318,611,246 bytes (approximately 2.08 TB) of
+709 time-lapse recordings of one artist's traditional drawing practice across
+more than two years (September 2024–September 14, 2026), with standardized acquisition
+since July 13, 2025. Across 2,092,887,119,300 bytes (approximately 2.08 TB) of
 video, the archive follows the same artist working in physical media—including
 pencil, ballpoint pen, fountain pen, brush, graphite, and ink—on fixed-format
 paper and illustration board.
-The release combines 549 canonical Standard videos and 128 earlier
+The current main branch combines 581 canonical Standard videos and 128 earlier
 Pre-Standard recordings. Every active indexed video has a persistent record
 ID, content hash, byte size, and encoded-stream metadata; historical session
 and provenance fields remain less complete in the Pre-Standard tier.
@@ -315,17 +315,17 @@ An earlier holding associated with the 2012–2016 archival scope comprises
 (approximately 9.06 TB). It consists primarily of uploaded 1080p drawing
 videos, with some livestream-derived material. Its [file-level holdings and SHA-256 manifest](Earlier_Archive_2012_2016/HOLDINGS_MANIFEST.json)
 is published in this repository; the media itself is not hosted and remains
-excluded from the current 677-record release totals.
+excluded from the current 709-record active-index totals.
 
 ## Snapshot and Coverage
 
-The table below describes the `v0.4.0` release candidate. Batch-level history
+The table below describes the moving main-branch snapshot after the September 14, 2026 ingest. The immutable `v0.4.0` release remains a 677-record snapshot and does not describe current `main`. Batch-level history
 is maintained in [`CHANGELOG.md`](CHANGELOG.md). The immutable `v0.3.0` tag
 remains a 467-row historical release and does not describe this snapshot.
 
 | Collection tier | Published MP4s | Indexed rows | Date coverage | Metadata state |
 | --- | ---: | ---: | --- | --- |
-| `standard` | 549 direct files | 549 | 2025-07-13–2026-09-02 | Complete core technical metadata for every direct Standard file |
+| `standard` | 581 direct files | 581 | 2025-07-13–2026-09-14 | Complete core technical metadata for every direct Standard file |
 | `pre_standard` | 128 | 128 | 2024-09-17–2025-07-09, plus 9 unknown dates | Complete core technical metadata; historical descriptive and provenance gaps remain |
 | [Earlier archive](Earlier_Archive_2012_2016/README.md) (metadata-only holding) | 0 hosted videos | 0 dataset rows; 2,381 fixity entries | Historical scope label 2012–2016 | 9,060,310,121,597 bytes held offline; file-level SHA-256 manifest published |
 
@@ -334,10 +334,10 @@ train/validation/test partition has been defined.
 
 ## Viewer and Metadata Discovery
 
-The release exposes two explicit configurations so metadata-complete canonical
+The current main-branch snapshot exposes two explicit configurations so metadata-complete canonical
 records are not silently mixed with historically less complete records:
 
-- `canonical/archive` is the default and loads root `metadata.csv` with the 549
+- `canonical/archive` is the default and loads root `metadata.csv` with the 581
   direct files in `Standard_Time_Lapses/`
 - `pre_standard/archive` loads `Pre_Standard_Time_Lapses/metadata.csv` with the
   128 direct files in that folder
@@ -350,7 +350,7 @@ zero or false. Both indexes declare tier membership directly: the root index set
 `collection_tier = standard` and `is_canonical = true`; the Pre-Standard CSV
 sets `collection_tier = pre_standard` and `is_canonical = false`.
 
-Published-index completeness is defined by the 549 rows in `canonical/archive`
+Published-index completeness is defined by the 581 rows in `canonical/archive`
 plus the 128 rows in `pre_standard/archive` and their generated Parquet
 exports. Hugging Face's separate column Statistics job is an auxiliary,
 asynchronous surface; its availability is not used to claim or reject
@@ -376,7 +376,7 @@ materials, studios, or drawing practices broadly.
 
 ### `Standard_Time_Lapses/`
 
-The directory contains 549 direct MP4 files. `metadata.csv` is their complete
+The directory contains 581 direct MP4 files. `metadata.csv` is their complete
 machine-readable canonical index: every direct file has one validated row with
 core technical metadata. Direct placement alone is not sufficient for future
 additions; metadata and release validation are required.
@@ -387,7 +387,7 @@ Each canonical metadata row now includes:
 - `collection_tier = standard`
 - `is_canonical = true`
 - an `acquisition_protocol_version`: 363 earlier-workflow rows use
-  `standard-2025-07-13`, while the 186 canonical fragments in the six dated
+  `standard-2025-07-13`, while the 218 canonical fragments in the seven dated
   relationship sidecars use `standard-2026-08-27`
 - descriptive session fields
 - encoded video properties
@@ -515,7 +515,7 @@ All `RecNN` members in one prospective grouping share the documented finish
 date and finish time of the complete grouping/physical work. The timestamp is
 not the individual end time of each fragment; `RecNN` records chronological
 position within the group. The manifests do not backfill every historical
-`RecNN` record. The 19 historical `RecNN` rows outside the six sidecars retain
+`RecNN` record. The 19 historical `RecNN` rows outside the seven sidecars retain
 `standard-2025-07-13`; their grouping or completeness claims remain limited to
 evidence explicitly recorded in `notes` or other documentation. A documented
 4K/30-fps InShot processing profile remains a candidate and does not
@@ -541,10 +541,13 @@ has 13 canonical fragments across two complete sequences and no derivative
 rows. The
 [`2026-09-02 sidecar`](Standard_Time_Lapses/Provenance/2026-09-02/fragment_sequence_relationships.csv)
 has 61 canonical fragments across five complete sequences and no derivative
-rows. In all six, `fragment_set_label` is a descriptive grouping label, not a
-global `work_id`. Together they identify exactly 186 canonical fragments for
+rows. The
+[`2026-09-14 sidecar`](Standard_Time_Lapses/Provenance/2026-09-14/fragment_sequence_relationships.csv)
+has 32 canonical fragments across two complete drawing sequences and no
+derivative rows. In all seven, `fragment_set_label` is a descriptive grouping label, not a
+global `work_id`. Together they identify exactly 218 canonical fragments for
 `standard-2026-08-27`. The nested derivative payloads are not included in the
-677 active rows or the active byte and duration totals.
+709 active rows or the active byte and duration totals.
 
 The protocol's capture orientation and a file's stored pixel orientation are
 different concepts. The `orientation`, `width_px`, and `height_px` metadata
@@ -633,7 +636,7 @@ third-party material that may appear on screens, in references, or in captured
 audio.
 
 Most active indexed videos at this revision contain an audio stream (485 of
-677, or 71.6%). `has_audio` records stream presence only; it does not establish
+709, or 68.4%). `has_audio` records stream presence only; it does not establish
 that the stream contains meaningful signal. Users are responsible for reviewing
 audio, visible screens, references, reflections, tattoos, and other potentially
 identifying or third-party content before redistribution or model release. A
@@ -642,8 +645,8 @@ archival video objects.
 
 ## Access and Reproducibility
 
-The active 677-video release contains 2,083,318,611,246 bytes of video
-(approximately 2.08 TB, or 1.89 TiB). Canonical files are often several
+The active 709-video main-branch snapshot contains 2,092,887,119,300 bytes of video
+(approximately 2.09 TB, or 1.90 TiB) and 57.522 encoded playback hours. Canonical files are often several
 gigabytes each, so users should select records through `metadata.csv` before
 downloading video.
 
@@ -777,7 +780,7 @@ python tools/repair_metadata.py source_metadata.csv metadata.csv \
 
 ## Versioning
 
-The `v0.4.0` release candidate establishes the current 677-record snapshot
+The immutable `v0.4.0` release establishes a 677-record snapshot
 after the reviewed post-v0.3 ingests, provenance corrections, and focused
 Standard protocol-version boundary. Record identity is carried by `record_id`;
 a filename may be corrected without creating a new conceptual record. Content
@@ -796,7 +799,7 @@ See `CHANGELOG.md` for release-level changes.
 - `VALIDATION.md` — validation scope and current results
 - `VIEWER_MIGRATION.md` — current Viewer configuration and verification
   invariants
-- `RELEASE_MANIFEST_V0.4.0.json` — current v0.4.0 release-candidate identity,
+- `RELEASE_MANIFEST_V0.4.0.json` — immutable v0.4.0 release identity,
   coverage, and critical-file receipt
 - `RELEASE_MANIFEST.json` — historical v0.2.0 release-candidate manifest; it
   does not describe the current snapshot or provide video-payload checksums

SCHEMA.md

@@ -284,9 +284,9 @@ commit. The captured inventory also binds the exact bytes of that revision's
 commit. The pinned receipt remains historical evidence and is not rewritten
 when the active metadata later records a protocol boundary.
 
-The canonical-fragment `record_id` values in the six sidecars dated
-`2026-08-27`, `2026-08-29`, `2026-08-30`, `2026-08-31`, `2026-09-01`, and
-`2026-09-02` are the current membership authority for
+The canonical-fragment `record_id` values in the seven sidecars dated
+`2026-08-27`, `2026-08-29`, `2026-08-30`, `2026-08-31`, `2026-09-01`,
+`2026-09-02`, and `2026-09-14` are the current membership authority for
 `standard-2026-08-27`. Noncanonical derivative rows do not receive a canonical
 protocol value. A dated sidecar does not introduce `work_id`, change any
 `record_id`, or backfill unrelated historical rows. Consequently, an active
@@ -296,11 +296,17 @@ protocol value. A dated sidecar does not introduce `work_id`, change any
 ## Recording-timing sidecar
 
 `Standard_Time_Lapses/Provenance/Recording_Timing/recording_timing.csv` is an
-exploratory derived table for the 186 canonical fragments in those six dated
-relationship sidecars. It joins to the canonical Standard index on `record_id`
+exploratory derived table for the 186 canonical fragments in the six fixed
+timing-v1 source sidecars dated `2026-08-27` through `2026-09-02`. It joins to the canonical Standard index on `record_id`
 and declares the exact source Hub revision. It is outside both active video
 indexes and does not add or replace canonical metadata fields.
 
+Timing v1's source revision and 186-row membership are fixed. Later canonical
+metadata may grow only after the exact historical 549-row source bytes; those
+appended rows must pass the canonical metadata validator and remain outside
+timing coverage until a separately reviewed, versioned timing layer includes
+them.
+
 The sidecar keeps three timing concepts separate:
 
 - `device_filename_start_local` is present only when a retained

SHA256SUMS

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Standard_Time_Lapses/Provenance/2026-09-14/README.md

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+# Recording relationship provenance — 2026-09-14
+
+This dated provenance layer documents two creator-confirmed complete drawings
+represented by 32 unchanged canonical Framelapse source recordings. The first
+drawing is the four-file `2026-09-02.2358.BallpointPen.Ink.Paper.9x12`
+sequence. The second drawing is the remaining 28-file
+`2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12` sequence. No
+concatenated or transcoded derivative is included in this ingestion.
+
+`fragment_sequence_relationships.csv` contains one canonical-fragment row per
+recording. Its two sets contain four and 28 contiguous `RecNN` positions. The
+`fragment_set_label` is the shared descriptive canonical filename stem; it is
+not a global `work_id`. Each row carries its persistent `record_id`, sequence
+position and count, ordinary source-file SHA-256, Hub Xet identity, byte size,
+and evidence state.
+
+The `sha256` column is an ordinary byte-level SHA-256. `hub_xet_hash` is the
+separate Hugging Face Xet identity; the values are not interchangeable. Every
+`source_hub_revision` value pins immutable metadata-bearing commit
+`db1d515c9626adf25207c2e844c913d74dba438f`, against which the sidecar, canonical media, and exact root
+`metadata.csv` bytes were validated. The sidecar is committed afterward and
+deliberately points back to that commit, avoiding a circular self-reference.
+
+The grouping labels and shared finish times are creator supplied: September 2,
+2026 at 23:58 for the four-file drawing and September 14, 2026 at 16:35 for the
+28-file drawing. A group finish time is not an individual fragment end time.
+Per-file filename, MP4-container, and filesystem times remain separate local
+audit observations and are not substituted for those finish labels.
+
+At ingest-audit time, the first four source files already bore their canonical
+archive names, so their `original_filename` values remain blank. The remaining
+28 rows preserve the exact transferred source names in `original_filename`,
+including the 27 literal `VID_*.mp4` names and one descriptive source name.
+Those names are retained as evidence rather than rewritten or generalized. The
+literal container tag `com.android.capture.fps=5.000000` is retained in row
+notes without using it to infer real drawing time.
+
+This relationship layer does not change the 29-field active video schema,
+introduce a global `work_id`, backfill historical rows, expand timing-v1
+coverage, change `standard-2025-07-13`, or create a new dataset version.

Standard_Time_Lapses/Provenance/2026-09-14/fragment_sequence_relationships.csv

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+fragment_set_label,object_role,record_id,file_path,sha256,hub_xet_hash,size_bytes,sequence_position,sequence_count,sequence_completeness,source_record_ids,derivative_coverage,evidence_state,source_hub_revision,notes
+2026-09-02.2358.BallpointPen.Ink.Paper.9x12,canonical_fragment,tla-5c6b8329390d241c,Standard_Time_Lapses/2026-09-02.2358.BallpointPen.Ink.Paper.9x12.Rec01.mp4,0910d56435f56041fec3d078c877b2e94f06073e8505c093463c878785eefb04,20422c69c116b60e62bcbbd5968389ac1a9f70eae1d939ad057b870038001f62,286850563,1,4,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-02.2358.BallpointPen.Ink.Paper.9x12,canonical_fragment,tla-75af198c44dae736,Standard_Time_Lapses/2026-09-02.2358.BallpointPen.Ink.Paper.9x12.Rec02.mp4,e83f42958483646e779e82e1b873e273d81338a434abfffc330e604f3a0f1ee0,2bf611eb0588981b6610ac75144279a4f405cb667ffaef3f524904e3545f795d,316109715,2,4,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
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+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-6512f4385f44f7a0,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec02.mp4,aca64517065900e04a7ba5101d4cd9e4364c7bed69a586e9b1d90ebfcfeda840,3fb9bbc0a9943647f7d0d1716946acfc51bccc6ba1a45132a965b1de728f9818,392559416,2,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-c4f5e807e89a58b8,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec03.mp4,3555dfe345b9a5c259e1cc3fac5674772d62467b1852ecccdd7dedd95ff81c66,48a69d89b670a540432aef6e9da2c76aa1befedfc23f098e701ebb7239f8763d,114710394,3,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-4096364256e10d0f,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec04.mp4,f050b04da8bcddca2a37513ff1497fe3453fb854387161a6d0151168cc6db887,e290f773eb61fbabfd4ce4de6ef56febf55a96539347e6d47ebcfed25f6386c0,110398572,4,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
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+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-110864db90ceef70,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec09.mp4,6f54d9d977c0d7feeb9228492974bd09d85d28687f699685152b4ee26a4dae7b,c74f825562dfc0b94af790b47f79bedd13d96e8e729e7c01ec4e6f1335dd5f21,392637386,9,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-20af93d1d5136df9,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec10.mp4,435089c77c32d7a5cd3e4aae917e17ebdd0685d48268e8bfa5ec4458f0fd619b,f897da4a3238ea3f1e0b632c736e566fd9b5703ce12b211abab876e26540dfa9,453850658,10,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-feb83a44b3b6ef03,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec11.mp4,00417118a10688bf6a4a1a8debfa698d313d5fd6e5d57653d49466685367c0ef,2aaad386148171bb2cdf1aa3dbe09bebac1ab25de0180962546cdc93c9c8e822,240941667,11,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-6df25b7f11bf68b3,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec12.mp4,5862cec6e4d286e55b6278f4288de96e425edfff538a33e2b3b174c183c9230b,e89b7dbe7fb36744434f5ee0d1a8559c150745f43b9062b82be1bfd649ab6bff,68829701,12,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-3d92849a7d15acba,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec13.mp4,787ed153dbdc6c16bdcee469696e3a30f799701a4f5cd32dbb2ba584a7342927,efb5601c19527ed95ffe0900435f1f52eba705dd5082b6e82a49254f5428e4aa,631106702,13,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-c12483bf506121a3,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec14.mp4,1604b0436edf8baff0dac080602ad5103d4d16b4b36551c3b7dc972ae1abf97e,9beb6bbd5624bfeec77d4f8c9f0ed22ec7590651df2c320130f96a5a0c76c304,342366725,14,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-eb614457b8f6c8f0,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec15.mp4,09f8280fc293a7e046ec37773529373b6ebac939fb1c17e3bd4447206d13a72b,bfb45129dd9f7e12a6d0b3e1a87249f374cb406cef45a4684090879027b441bb,399318424,15,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-9ba7b5c7ecaa775d,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec16.mp4,2cc1bfec3b66dc8b868a0ccdd7731eaf0524969bfddc70c478cc41cf51e94bf3,d29472b0c39a576a116f6fecf3809598bc453736ae9e82ac322593822277d230,344263119,16,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-7645d26722ce0c52,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec17.mp4,87763f2c5f8e41ac28ba0f3a139c274feaad4d161adbb51176fbb6725279d534,08f2934248681d15ac223e0d314593967d51bc3036dfaa1974c899c77535d8d8,546496811,17,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-b1a7d42d457406fe,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec18.mp4,f534b44d4a5f13ed069d070b04ca21add1691f64b3a87066e8845a18339056cc,a6fc2b97fe8a0cc499fc3a1bd04543118af47dd7905cddac081530db7ae9373e,544610649,18,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-cbaf902dfe2dd5a7,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec19.mp4,45c93e47d8849d26cdc90f8e73c5af6933373efceb317a8d242984f0b69c555e,c1d28cc2c4930f958dba7f42233fe3364794b5d00aeb38820737938add8756ed,248563848,19,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-43696f23545c589c,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec20.mp4,9eab210375f2c1b72a6e1c929fce28bf69fcc3e1eb627a42be7668c57259e418,2425e0b706c529d3006f46389eb7fdfb6c2ee8b9b5f4d06bc416a3e595de5065,285279165,20,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-32eb7cc954804a64,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec21.mp4,99aafff969d0015fdd19380b8849c949be35df6c0fbc803f83723ba063df71a6,3c0f030460fcdff8156b5060b1a7eff03f6232633ffb09d2c6e4a98923a457b9,376815914,21,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-74167ccfc2d1743f,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec22.mp4,4df16d7cecceba15648cb3715abff45e543cbe727aba4f369d1f98a6e715c63a,8b3f1e94ff94cc173d8be94d79330a1fb1ca137ebf71645e70a605bf896bdf10,133018809,22,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-47a3a6ff70817119,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec23.mp4,72f9c2874aff0e32d46d912068bb30657ba8596e8704c179b94fdb58a16f549a,b8c6fbc213d2a621f7fb0e4958c8bce9bc33aa90331a12a198cdf2fce84bfe3a,353760127,23,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-464bd05e82c56c21,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec24.mp4,09065fdae19a98face7f28f55436764442faedb74fe725d2cfaff077f4dcd1bf,21048ae485fe72f1f5e5a369505a7b265ddf02073a39f99b3808580cd06eb62e,386976681,24,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-a5d5665d0e48d447,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec25.mp4,787fdd770b80674e9bc07885cfeed3c61f38cd666ebbd965cd85109895af0dd6,f9cfaf58f1c4383ac1ba20b153e86ad47c6cf7f72d3f8740a46166cc429e383b,5779520,25,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-b2424a7706bda7ab,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec26.mp4,88499ba2f6e130cdf45d55b3185d32a9590e3d0e63ad285b5d898a46c6c1ff9d,04de7b24f59a532c484c9f4b9d10c550d27a8affd593e2fbfbcbc62a9bfa6dcc,439546806,26,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-f58a3f3919c3bf82,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec27.mp4,620dab5e8db30b5a092ff02402f44b26d28f0adde8f57a7a8bc336674bd2a229,a358e5bfbcf9fb611cc871722f76ff081bf73138e60bec970f3557ea831c8f09,275715837,27,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.
+2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12,canonical_fragment,tla-65cbedac0ae6a1bc,Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec28.mp4,d13aa7fd57e02d084fad1f2584c9a33cfedf9655c1e89a28ce6d34d81106c167,ea1a3887263f48807a70e3c0aca57fa926ce4f775a8b50da273a3beb333d59f2,287980146,28,28,owner_confirmed_complete,,,owner-confirmed; checksum-computed; media-probed; demux-verified; sampled-decode-verified,db1d515c9626adf25207c2e844c913d74dba438f,Canonical group time is the creator-supplied completion label. Direct filename/container/filesystem timing observations are retained in the local timing audit and are not substituted for completion time. Literal container tag com.android.capture.fps=5.000000; no real-time duration inferred.

Standard_Time_Lapses/Provenance/README.md

@@ -34,10 +34,12 @@ Relationship sidecars can group those objects without merging their persistent
   two complete source sequences and no derivative payloads.
 - [`2026-09-02/`](2026-09-02/README.md) documents 61 canonical fragments across
   five complete source sequences and no derivative payloads.
+- [`2026-09-14/`](2026-09-14/README.md) documents 32 canonical fragments across
+  two complete drawing sequences and no derivative payloads.
 
 ## Documented fragment sequences
 
-These are the twenty-five sets recorded in the six dated relationship sidecars.
+These are the twenty-seven sets recorded in the seven dated relationship sidecars.
 `fragment_set_label` is a descriptive grouping label, not a global `work_id`.
 `owner_confirmed_complete` applies to the canonical source sequence represented
 in that sidecar; it does not establish real drawing time or claim that activity
@@ -70,6 +72,8 @@ outside the retained recordings was captured.
 | [2026-09-02](2026-09-02/fragment_sequence_relationships.csv) | `2026-09-02.0301.BallpointPen.Ink.Paper.9x12` | 11 | `Rec01`–`Rec11` | `owner_confirmed_complete` |
 | [2026-09-02](2026-09-02/fragment_sequence_relationships.csv) | `2026-09-02.0813.BallpointPen.Ink.Paper.9x12` | 10 | `Rec01`–`Rec10` | `owner_confirmed_complete` |
 | [2026-09-02](2026-09-02/fragment_sequence_relationships.csv) | `2026-09-02.2023.BallpointPen.Ink.Paper.9x12` | 19 | `Rec01`–`Rec19` | `owner_confirmed_complete` |
+| [2026-09-14](2026-09-14/fragment_sequence_relationships.csv) | `2026-09-02.2358.BallpointPen.Ink.Paper.9x12` | 4 | `Rec01`–`Rec04` | `owner_confirmed_complete` |
+| [2026-09-14](2026-09-14/fragment_sequence_relationships.csv) | `2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12` | 28 | `Rec01`–`Rec28` | `owner_confirmed_complete` |
 
 The dated CSV files remain authoritative for row-level identities, ordering,
 derivative coverage, evidence states, hashes, and pinned source revisions.

VALIDATION.md

@@ -1,5 +1,40 @@
 # Validation Report
 
+## Unreleased 2026-09-14 ingest candidate
+
+The media-only pull-request inventory resolves to immutable revision
+`0ef0f61cd0c54232baa58774713d57168e5e90de`. The 32 new media paths match the audited ordinary
+SHA-256 values and byte sizes and have 32 nonblank, unique Xet identities. The
+metadata-bearing inventory resolves to `db1d515c9626adf25207c2e844c913d74dba438f` and contains the exact
+581-row root index used below. The new sidecar pins that metadata-bearing
+revision and is committed afterward, avoiding a circular self-reference.
+
+| Check | Result |
+| --- | ---: |
+| New unchanged canonical fragments | 32 |
+| Complete drawings / sequence sizes | 2 / 4 and 28 |
+| New media bytes / encoded seconds | 9,568,508,054 / 1,859.281028 |
+| Local SHA-256 / full demux / sampled decodes | 32/32 / 32/32 / 96/96 |
+| Declared / counted video frames | 55,779 / 55,779 |
+| Root `metadata.csv` | 411,583 bytes; SHA-256 `f493638a947ec3a053845a02c4f64e6d57e3bd852948805c886b678adbdd7479` |
+| Canonical Standard / Pre-Standard / active rows | 581 / 128 / 709 |
+| Earlier / prospective Standard protocol rows | 363 / 218 |
+| Dated relationship sidecars / complete groups | 7 / 27 |
+| New relationship rows / derivatives | 32 / 0 |
+| Timing-v1 rows / dated source sidecars | 186 / 6 (unchanged) |
+| `SHA256SUMS` | 103,245 bytes; SHA-256 `09ff9cbb6722886b882c35aed2e2247944d7ec960508aa4504e6e226f90bbf17` |
+| Manifest payload coverage | 715 / 715; 2,109,646,344,575 bytes |
+| Active indexed video bytes / encoded playback | 2,092,887,119,300 / 207,079.218218 seconds |
+| Active videos with an audio stream | 485 / 709 (68.4%) |
+| Expected pull-request paths | 45 = 32 media + 13 non-media |
+
+The first four files form the first creator-confirmed complete drawing and keep
+the `2026-09-02.2358` finish label. The remaining 28 form the second complete
+drawing and use the creator-supplied `2026-09-14.1635` finish label. Filename,
+MP4-container, and filesystem times remain separate audit observations; none is
+substituted for the group finish label. No existing canonical metadata row,
+media path, payload, or relationship row is rewritten by this append.
+
 ## Unreleased exploratory recording-timing layer
 
 The recording-timing sidecar is pinned to source revision
@@ -7,6 +42,23 @@ The recording-timing sidecar is pinned to source revision
 canonical fragments in the six dated relationship sidecars. The included
 validator passed with repository-packet self-consistency scope.
 
+Its 549-row, 370,833-byte canonical metadata receipt remains a historical
+snapshot. The validator requires those exact bytes to remain the prefix of the
+current root `metadata.csv`, including SHA-256
+`d516da7a4341dddf0b2b5ad50f6200f283ea0cdefc6de465882fbc021abfba8a`, while
+permitting rows with the same 29-field header and width and nonblank, globally
+unique `record_id`, `file_name`, and `hub_xet_hash` identities to be appended
+after that prefix. The root metadata validator remains authoritative for the
+rest of the schema. Appended rows remain outside timing v1 coverage until a
+separately reviewed, versioned timing layer includes them.
+
+The preserved v1 bundle's `validation_summary.json` still records
+`metadata_csv_sha256_unchanged: true`. That is a historical result from the
+pinned-revision publication check, not a claim that the current whole
+`metadata.csv` keeps the old hash after append. Current compatibility is
+established by the exact historical prefix receipt plus current joins for all
+186 covered records.
+
 | Check | Result |
 | --- | ---: |
 | Timing rows | 186 |
@@ -20,7 +72,7 @@ validator passed with repository-packet self-consistency scope.
 | Final boundaries near documented finish minute | 24 / 25 |
 | Preserved documented-finish conflicts | 1 |
 | Timing bundle files verified | 8 |
-| Repository regression tests | 40 / 40 passed |
+| Repository regression tests | 46 / 46 passed |
 
 The one retained conflict is
 `2026-09-01.0213.BallpointPen.Ink.Paper.9x12`, whose final MP4 boundary is
@@ -30,7 +82,8 @@ start-to-finalization intervals; it is neither drawing-active time nor corpus
 calendar span. Calculation before three-decimal row serialization differs by
 0.001667 seconds.
 
-The validator recomputes identity joins, timestamp arithmetic, row formulas,
+The validator recomputes the historical metadata-prefix receipt, current
+identity joins for all 186 covered records, timestamp arithmetic, row formulas,
 full-precision calibration metrics, sequence chronology, group summaries,
 validation summaries, source receipts, and bundle hashes:
 
@@ -41,11 +94,11 @@ python -m unittest discover -s tools -p "test_*.py" -v
 
 This repository-only run does not re-probe source-media tags or frame counts,
 rehash the 186 source videos, verify the retained local audit bytes, or
-re-observe NTFS timestamps. No MP4, canonical metadata row or field,
-relationship sidecar, Viewer configuration, or root `SHA256SUMS` payload entry
-is changed by the timing layer.
+re-observe NTFS timestamps. Publication of the timing layer changed no MP4,
+canonical metadata row or field, relationship sidecar, Viewer configuration,
+or root `SHA256SUMS` payload entry.
 
-## Current v0.4.0 release candidate
+## Immutable v0.4.0 release-candidate receipt
 
 Branch `codex/prepare-v0.4.0-release` starts at exact Hub `main` revision
 `442b4786afbdd31bd16cd0a1488f09c07f956316`, the merged result of Hugging Face
@@ -229,7 +282,7 @@ cross-check did not transfer and rehash all 2.079 TB of payload bytes; a full
 download can independently reproduce every digest with
 `tools/validate_sha256sums.py --verify-root`.
 
-## New-source media verification
+## PR #45 new-source media verification
 
 Before upload, all 29 sources were SHA-256 hashed, probed, fully demuxed, and
 sample-decoded as raw pixels at start, middle, and near-end checkpoints. An
@@ -242,7 +295,7 @@ packets, and zero errors. The local source directory was not modified.
 
 ### Fragment sequences
 
-All six dated sidecars pass current structural and metadata-join validation:
+All seven dated sidecars pass current structural and metadata-join validation:
 
 | Sidecar | Canonical fragments | Derivatives | Sets | Result |
 | --- | ---: | ---: | ---: | --- |
@@ -252,6 +305,7 @@ All six dated sidecars pass current structural and metadata-join validation:
 | `2026-08-31` | 32 | 0 | 4 | zero errors |
 | `2026-09-01` | 13 | 0 | 2 | zero errors |
 | `2026-09-02` | 61 | 0 | 5 | zero errors |
+| `2026-09-14` | 32 | 0 | 2 | zero errors |
 
 The validator compares canonical byte sizes with joined metadata and emits an
 explicit verification level. The new sidecar was checked against the exact
@@ -293,17 +347,17 @@ visual authentication of absent media.
 
 ## Regression tests
 
-The dependency-free suites currently run 35 tests covering repository receipt
+The dependency-free suites currently run 46 tests covering repository receipt
 binding, fragment-size joins and verification levels, semantic documentation
 and metadata invariants, the exact protocol-version boundary and prospective
 timestamp scope, and physical-reference identity, hash-state, pairing, manifest,
-and metadata-join failures.
+metadata-join failures, and append-compatible recording-timing receipts.
 
 ```bash
 python -m unittest discover -s tools -p "test_*.py"
 ```
 
-Result: **35/35 passed**.
+Result: **46/46 passed**.
 
 ## Outstanding curator questions and limitations
 
@@ -315,7 +369,7 @@ These remain explicit; validation must not guess their answers:
    documented finish label applies to a recording, session, reviewed fragment
    sequence, or physical work. Under `standard-2026-08-27`, the scope is the
    complete prospective grouping/physical work.
-3. Nineteen active Standard `RecNN` rows are outside the six dated fragment
+3. Nineteen active Standard `RecNN` rows are outside the seven dated fragment
    sidecars and retain `standard-2025-07-13`. Their existing notes and changelog
    evidence remain authoritative; sidecar absence does not establish no
    relationship or sequence completeness.
@@ -325,7 +379,7 @@ These remain explicit; validation must not guess their answers:
 5. Three Standard records are explicitly documented shortened derivatives,
    not full-duration masters.
 6. Most active indexed videos at this revision contain an audio stream (485 of
-   677). Stream presence does not establish meaningful signal; rights and
+   709). Stream presence does not establish meaningful signal; rights and
    privacy review remain necessary.
 7. Encoded frame rate and playback duration cannot by themselves recover
    wall-clock or real drawing time. The recording-timing sidecar provides
@@ -404,6 +458,11 @@ python tools/validate_fragment_relationships.py \
   --relationships Standard_Time_Lapses/Provenance/2026-09-02/fragment_sequence_relationships.csv \
   --metadata pinned/7fca6fcc36d873b92a6c64fff5980e8d5afde5a6/metadata.csv \
   --repo-inventory-json repo_inventory_7fca6fcc.json
+
+python tools/validate_fragment_relationships.py \
+  --relationships Standard_Time_Lapses/Provenance/2026-09-14/fragment_sequence_relationships.csv \
+  --metadata pinned/db1d515c9626adf25207c2e844c913d74dba438f/metadata.csv \
+  --repo-inventory-json repo_inventory_db1d515c.json
 ```
 
 Retrieve the exact historical metadata bound by the physical-reference

metadata.csv

@@ -548,3 +548,35 @@ Standard_Time_Lapses/2026-09-02.2023.BallpointPen.Ink.Paper.9x12.Rec16.mp4,tla-5
 Standard_Time_Lapses/2026-09-02.2023.BallpointPen.Ink.Paper.9x12.Rec17.mp4,tla-8798576f14ef3da8,standard,true,standard-2026-08-27,2026-09-02,20:23,BallpointPen,Ink,Paper,9x12,72.0659,3840,2160,landscape,30.000301,hevc,yuvj420p,mp4,False,a5798d15b4f259d088a65ef5b54f85ecd3ecdd15d304703f94eaeac66d28f58a,,direct_root_upload,,,manual_confirmation,,367391132,"Creator-confirmed untouched Framelapse source fragment 17 of 19 in an owner-confirmed complete drawing sequence. At ingest audit, the source bore its canonical archive filename; an earlier device filename is not documented. Local SHA-256 matched the retained pre-upload inventory. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-02; the container reports 2,162 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. RecNN records sequence only."
 Standard_Time_Lapses/2026-09-02.2023.BallpointPen.Ink.Paper.9x12.Rec18.mp4,tla-00b52ab79e711cd7,standard,true,standard-2026-08-27,2026-09-02,20:23,BallpointPen,Ink,Paper,9x12,88.2991,3840,2160,landscape,30.000298,hevc,yuvj420p,mp4,False,dbb0343e1dcb0894095d0899e578946777a9dccb005bc3a9fd500916ca0fce0b,,direct_root_upload,,,manual_confirmation,,449686205,"Creator-confirmed untouched Framelapse source fragment 18 of 19 in an owner-confirmed complete drawing sequence. At ingest audit, the source bore its canonical archive filename; an earlier device filename is not documented. Local SHA-256 matched the retained pre-upload inventory. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-02; the container reports 2,649 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. RecNN records sequence only."
 Standard_Time_Lapses/2026-09-02.2023.BallpointPen.Ink.Paper.9x12.Rec19.mp4,tla-ed8a317bfe550db7,standard,true,standard-2026-08-27,2026-09-02,20:23,BallpointPen,Ink,Paper,9x12,79.365878,3840,2160,landscape,30.000298,hevc,yuvj420p,mp4,False,192bc078385ef97bfad744398bbc5ab52c754cd3a171bd0154c24f20c9ce4cc6,,direct_root_upload,,,manual_confirmation,,404579820,"Creator-confirmed untouched Framelapse source fragment 19 of 19 in an owner-confirmed complete drawing sequence. At ingest audit, the source bore its canonical archive filename; an earlier device filename is not documented. Local SHA-256 matched the retained pre-upload inventory. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-02; the container reports 2,381 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-02.2358.BallpointPen.Ink.Paper.9x12.Rec01.mp4,tla-5c6b8329390d241c,standard,true,standard-2026-08-27,2026-09-02,23:58,BallpointPen,Ink,Paper,9x12,56.232767,3840,2160,landscape,30.000302,hevc,yuvj420p,mp4,False,20422c69c116b60e62bcbbd5968389ac1a9f70eae1d939ad057b870038001f62,,direct_root_upload,,,manual_confirmation,,286850563,"Creator-confirmed source fragment 1 of 4 in an owner-confirmed complete drawing sequence. At ingest audit, the transferred source already bore its canonical archive filename; an earlier device filename is not documented. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1687. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-02.2358.BallpointPen.Ink.Paper.9x12.Rec02.mp4,tla-75af198c44dae736,standard,true,standard-2026-08-27,2026-09-02,23:58,BallpointPen,Ink,Paper,9x12,62.166,3840,2160,landscape,30.0003,hevc,yuvj420p,mp4,False,2bf611eb0588981b6610ac75144279a4f405cb667ffaef3f524904e3545f795d,,direct_root_upload,,,manual_confirmation,,316109715,"Creator-confirmed source fragment 2 of 4 in an owner-confirmed complete drawing sequence. At ingest audit, the transferred source already bore its canonical archive filename; an earlier device filename is not documented. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1865. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-02.2358.BallpointPen.Ink.Paper.9x12.Rec03.mp4,tla-1e02711fc268a776,standard,true,standard-2026-08-27,2026-09-02,23:58,BallpointPen,Ink,Paper,9x12,54.632789,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,a9b09a29346d2ca55deafc6cc2a42c9730ee0a58d48e17630b4d19bfd17d916f,,direct_root_upload,,,manual_confirmation,,278094677,"Creator-confirmed source fragment 3 of 4 in an owner-confirmed complete drawing sequence. At ingest audit, the transferred source already bore its canonical archive filename; an earlier device filename is not documented. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1639. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-02.2358.BallpointPen.Ink.Paper.9x12.Rec04.mp4,tla-14cb6e9872cf8a3a,standard,true,standard-2026-08-27,2026-09-02,23:58,BallpointPen,Ink,Paper,9x12,37.632956,3840,2160,landscape,30.000301,hevc,yuvj420p,mp4,False,fc494c0a52b00c4898b71124127f5613fa50beea4d583eef9001195193b1c1cc,,direct_root_upload,,,manual_confirmation,,192250029,"Creator-confirmed source fragment 4 of 4 in an owner-confirmed complete drawing sequence. At ingest audit, the transferred source already bore its canonical archive filename; an earlier device filename is not documented. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1129. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec01.mp4,tla-9a9d7688deaa4e6e,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,15.433178,3840,2160,landscape,30.000302,hevc,yuvj420p,mp4,False,488bc7982dc94e3b361feefbf4023ddf919d6cf6d6dc6f79aeb0f41b48f0e3c0,Pencil.Graphite.FountainPen.Ink.Paper.9x12.mp4,direct_root_upload,,,manual_confirmation,,97855198,"Creator-confirmed source fragment 1 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 463. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec02.mp4,tla-6512f4385f44f7a0,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,63.6327,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,3fb9bbc0a9943647f7d0d1716946acfc51bccc6ba1a45132a965b1de728f9818,VID_20260903_053113.mp4,direct_root_upload,,,manual_confirmation,,392559416,"Creator-confirmed source fragment 2 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1909. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec03.mp4,tla-c4f5e807e89a58b8,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,22.299778,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,48a69d89b670a540432aef6e9da2c76aa1befedfc23f098e701ebb7239f8763d,VID_20260903_053856.mp4,direct_root_upload,,,manual_confirmation,,114710394,"Creator-confirmed source fragment 3 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 669. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec04.mp4,tla-4096364256e10d0f,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,21.699778,3840,2160,landscape,30.000292,hevc,yuvj420p,mp4,False,e290f773eb61fbabfd4ce4de6ef56febf55a96539347e6d47ebcfed25f6386c0,VID_20260903_054208.mp4,direct_root_upload,,,manual_confirmation,,110398572,"Creator-confirmed source fragment 4 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 651. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec05.mp4,tla-0b39ac56b7e63539,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,18.8331,3840,2160,landscape,30.000301,hevc,yuvj420p,mp4,False,5c694bf50c7b5e089573df57d842170aba52a577f2cbcaaaeba79451476f4e0e,VID_20260914_113902.mp4,direct_root_upload,,,manual_confirmation,,102638542,"Creator-confirmed source fragment 5 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 565. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec06.mp4,tla-69c2987ba28ab638,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,88.332456,3840,2160,landscape,30.000298,hevc,yuvj420p,mp4,False,f42cb28dff0ab7ee506c10eabd0584a09efaa90419e0c34fa888e89bd23ab76c,VID_20260914_114211.mp4,direct_root_upload,,,manual_confirmation,,450042015,"Creator-confirmed source fragment 6 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2650. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec07.mp4,tla-dfa938d46e9a04fe,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,37.532956,3840,2160,landscape,30.000302,hevc,yuvj420p,mp4,False,8a0c51998a7254c1b5cb3bd6d93a5de753b68d79dbc8d6584d5947d8a68aa8d7,VID_20260914_115331.mp4,direct_root_upload,,,manual_confirmation,,191189991,"Creator-confirmed source fragment 7 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1126. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec08.mp4,tla-7a0f8d8e35ee24bf,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,54.6661,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,26fe5860973946afcf9ea9b6e4a99ef32d2261fb60748617fc7fbc87702c8f29,VID_20260914_115811.mp4,direct_root_upload,,,manual_confirmation,,277950247,"Creator-confirmed source fragment 8 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1640. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec09.mp4,tla-110864db90ceef70,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,77.0992,3840,2160,landscape,30.000298,hevc,yuvj420p,mp4,False,c74f825562dfc0b94af790b47f79bedd13d96e8e729e7c01ec4e6f1335dd5f21,VID_20260914_120516.mp4,direct_root_upload,,,manual_confirmation,,392637386,"Creator-confirmed source fragment 9 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2313. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec10.mp4,tla-20af93d1d5136df9,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,89.0991,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,f897da4a3238ea3f1e0b632c736e566fd9b5703ce12b211abab876e26540dfa9,VID_20260914_121450.mp4,direct_root_upload,,,manual_confirmation,,453850658,"Creator-confirmed source fragment 10 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2673. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec11.mp4,tla-feb83a44b3b6ef03,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,47.432856,3840,2160,landscape,30.000302,hevc,yuvj420p,mp4,False,2aaad386148171bb2cdf1aa3dbe09bebac1ab25de0180962546cdc93c9c8e822,VID_20260914_124815.mp4,direct_root_upload,,,manual_confirmation,,240941667,"Creator-confirmed source fragment 11 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1423. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec12.mp4,tla-6df25b7f11bf68b3,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,13.5665,3840,2160,landscape,30.000295,hevc,yuvj420p,mp4,False,e89b7dbe7fb36744434f5ee0d1a8559c150745f43b9062b82be1bfd649ab6bff,VID_20260914_125524.mp4,direct_root_upload,,,manual_confirmation,,68829701,"Creator-confirmed source fragment 12 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 407. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec13.mp4,tla-3d92849a7d15acba,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,123.8654,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,efb5601c19527ed95ffe0900435f1f52eba705dd5082b6e82a49254f5428e4aa,VID_20260914_125839.mp4,direct_root_upload,,,manual_confirmation,,631106702,"Creator-confirmed source fragment 13 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 3716. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec14.mp4,tla-c12483bf506121a3,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,67.265978,3840,2160,landscape,30.000307,hevc,yuvj420p,mp4,False,9beb6bbd5624bfeec77d4f8c9f0ed22ec7590651df2c320130f96a5a0c76c304,VID_20260914_134145.mp4,direct_root_upload,,,manual_confirmation,,342366725,"Creator-confirmed source fragment 14 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2018. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec15.mp4,tla-eb614457b8f6c8f0,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,78.465878,3840,2160,landscape,30.000302,hevc,yuvj420p,mp4,False,bfb45129dd9f7e12a6d0b3e1a87249f374cb406cef45a4684090879027b441bb,VID_20260914_135111.mp4,direct_root_upload,,,manual_confirmation,,399318424,"Creator-confirmed source fragment 15 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2354. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec16.mp4,tla-9ba7b5c7ecaa775d,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,67.5993,3840,2160,landscape,30.000301,hevc,yuvj420p,mp4,False,d29472b0c39a576a116f6fecf3809598bc453736ae9e82ac322593822277d230,VID_20260914_140316.mp4,direct_root_upload,,,manual_confirmation,,344263119,"Creator-confirmed source fragment 16 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2028. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec17.mp4,tla-7645d26722ce0c52,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,107.232256,3840,2160,landscape,30.000298,hevc,yuvj420p,mp4,False,08f2934248681d15ac223e0d314593967d51bc3036dfaa1974c899c77535d8d8,VID_20260914_141145.mp4,direct_root_upload,,,manual_confirmation,,546496811,"Creator-confirmed source fragment 17 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 3217. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec18.mp4,tla-b1a7d42d457406fe,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,106.832267,3840,2160,landscape,30.0003,hevc,yuvj420p,mp4,False,a6fc2b97fe8a0cc499fc3a1bd04543118af47dd7905cddac081530db7ae9373e,VID_20260914_142950.mp4,direct_root_upload,,,manual_confirmation,,544610649,"Creator-confirmed source fragment 18 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 3205. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec19.mp4,tla-cbaf902dfe2dd5a7,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,48.7328,3840,2160,landscape,30.000301,hevc,yuvj420p,mp4,False,c1d28cc2c4930f958dba7f42233fe3364794b5d00aeb38820737938add8756ed,VID_20260914_144741.mp4,direct_root_upload,,,manual_confirmation,,248563848,"Creator-confirmed source fragment 19 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1462. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec20.mp4,tla-43696f23545c589c,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,55.9661,3840,2160,landscape,30.000298,hevc,yuvj420p,mp4,False,2425e0b706c529d3006f46389eb7fdfb6c2ee8b9b5f4d06bc416a3e595de5065,VID_20260914_145530.mp4,direct_root_upload,,,manual_confirmation,,285279165,"Creator-confirmed source fragment 20 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1679. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec21.mp4,tla-32eb7cc954804a64,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,73.999256,3840,2160,landscape,30.000302,hevc,yuvj420p,mp4,False,3c0f030460fcdff8156b5060b1a7eff03f6232633ffb09d2c6e4a98923a457b9,VID_20260914_150615.mp4,direct_root_upload,,,manual_confirmation,,376815914,"Creator-confirmed source fragment 21 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2220. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec22.mp4,tla-74167ccfc2d1743f,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,26.233067,3840,2160,landscape,30.000305,hevc,yuvj420p,mp4,False,8b3f1e94ff94cc173d8be94d79330a1fb1ca137ebf71645e70a605bf896bdf10,VID_20260914_151649.mp4,direct_root_upload,,,manual_confirmation,,133018809,"Creator-confirmed source fragment 22 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 787. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec23.mp4,tla-47a3a6ff70817119,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,69.465967,3840,2160,landscape,30.000298,hevc,yuvj420p,mp4,False,b8c6fbc213d2a621f7fb0e4958c8bce9bc33aa90331a12a198cdf2fce84bfe3a,VID_20260914_152050.mp4,direct_root_upload,,,manual_confirmation,,353760127,"Creator-confirmed source fragment 23 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2084. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec24.mp4,tla-464bd05e82c56c21,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,75.8659,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,21048ae485fe72f1f5e5a369505a7b265ddf02073a39f99b3808580cd06eb62e,VID_20260914_153020.mp4,direct_root_upload,,,manual_confirmation,,386976681,"Creator-confirmed source fragment 24 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2276. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec25.mp4,tla-a5d5665d0e48d447,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,0.899989,3840,2160,landscape,30.00037,hevc,yuvj420p,mp4,False,f9cfaf58f1c4383ac1ba20b153e86ad47c6cf7f72d3f8740a46166cc429e383b,VID_20260914_160420.mp4,direct_root_upload,,,manual_confirmation,,5779520,"Creator-confirmed source fragment 25 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 27. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec26.mp4,tla-b2424a7706bda7ab,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,86.2658,3840,2160,landscape,30.000301,hevc,yuvj420p,mp4,False,04de7b24f59a532c484c9f4b9d10c550d27a8affd593e2fbfbcbc62a9bfa6dcc,VID_20260914_161002.mp4,direct_root_upload,,,manual_confirmation,,439546806,"Creator-confirmed source fragment 26 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 2588. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec27.mp4,tla-f58a3f3919c3bf82,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,54.099456,3840,2160,landscape,30.000302,hevc,yuvj420p,mp4,False,a358e5bfbcf9fb611cc871722f76ff081bf73138e60bec970f3557ea831c8f09,VID_20260914_162041.mp4,direct_root_upload,,,manual_confirmation,,275715837,"Creator-confirmed source fragment 27 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1623. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."
+Standard_Time_Lapses/2026-09-14.1635.Pencil.Graphite.FountainPen.Ink.Paper.9x12.Rec28.mp4,tla-65cbedac0ae6a1bc,standard,true,standard-2026-08-27,2026-09-14,16:35,Pencil;FountainPen,Graphite;Ink,Paper,9x12,56.1994,3840,2160,landscape,30.000302,hevc,yuvj420p,mp4,False,ea1a3887263f48807a70e3c0aca57fa926ce4f775a8b50da273a3beb333d59f2,VID_20260914_162854.mp4,direct_root_upload,,,manual_confirmation,,287980146,"Creator-confirmed source fragment 28 of 28 in an owner-confirmed complete drawing sequence. The exact transferred source name is retained in original_filename; a filename-derived device start is recorded separately only when the VID pattern is present. Local SHA-256 matched the accepted audit baseline and source size/mtime remained stable during verification. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-09-14; declared and counted video frames agree at 1686. Stored as 3840x2160 landscape-coded HEVC with -90-degree display rotation. The literal container tag com.android.capture.fps=5.000000 is recorded without inferring real drawing time. The canonical date/time is the creator-supplied drawing completion label; per-file filename, container, and filesystem times remain separate audit observations. RecNN records sequence only."

tools/test_recording_timing.py

@@ -41,6 +41,43 @@ def rewrite_bundle(timing_dir: Path) -> None:
     )
 
 
+def read_csv_table(path: Path) -> tuple[list[str], list[dict[str, str]]]:
+    with path.open("r", encoding="utf-8-sig", newline="") as handle:
+        reader = csv.DictReader(handle)
+        return list(reader.fieldnames or []), list(reader)
+
+
+def write_csv_table(
+    path: Path, fieldnames: list[str], rows: list[dict[str, str]]
+) -> None:
+    with path.open("w", encoding="utf-8", newline="") as handle:
+        writer = csv.DictWriter(handle, fieldnames=fieldnames, lineterminator="\n")
+        writer.writeheader()
+        writer.writerows(rows)
+
+
+def synthetic_metadata_row(template: dict[str, str]) -> dict[str, str]:
+    row = dict(template)
+    row.update(
+        {
+            "file_name": (
+                "Standard_Time_Lapses/2099-12-31.2359."
+                "Pencil.Graphite.Paper.9x12.mp4"
+            ),
+            "record_id": "tla-0000000000000000",
+            "date": "2099-12-31",
+            "time": "23:59",
+            "hub_xet_hash": "0" * 64,
+            "original_filename": "",
+            "legacy_provenance_path": "",
+            "legacy_related_references": "",
+            "provenance_reference_duration_delta_seconds": "",
+            "notes": "Synthetic unrelated append-only validator fixture.",
+        }
+    )
+    return row
+
+
 class RecordingTimingValidatorTests(unittest.TestCase):
     def run_validator(self, root: Path) -> subprocess.CompletedProcess[str]:
         return subprocess.run(
@@ -72,6 +109,161 @@ class RecordingTimingValidatorTests(unittest.TestCase):
         self.assertEqual(summary["status"], "ok")
         self.assertEqual(summary["timing_rows"], 186)
 
+    def test_unrelated_appended_metadata_row_is_accepted(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-timing-append-") as temp_dir:
+            root = Path(temp_dir)
+            self.copy_fixture(root)
+            metadata_path = root / "metadata.csv"
+            fieldnames, rows = read_csv_table(metadata_path)
+            addition = synthetic_metadata_row(rows[-1])
+            self.assertNotIn(addition["record_id"], {row["record_id"] for row in rows})
+            self.assertNotIn(addition["file_name"], {row["file_name"] for row in rows})
+            self.assertTrue(metadata_path.read_bytes().endswith(b"\n"))
+            with metadata_path.open("a", encoding="utf-8", newline="") as handle:
+                writer = csv.DictWriter(
+                    handle, fieldnames=fieldnames, lineterminator="\n"
+                )
+                writer.writerow(addition)
+            completed = self.run_validator(root)
+
+        self.assertEqual(completed.returncode, 0, completed.stdout + completed.stderr)
+        summary = json.loads(completed.stdout)
+        self.assertEqual(summary["status"], "ok")
+        self.assertEqual(summary["timing_rows"], 186)
+        self.assertEqual(summary["pinned_metadata_rows"], 549)
+        self.assertEqual(summary["current_metadata_rows"], len(rows) + 1)
+        self.assertEqual(
+            summary["metadata_receipt_mode"],
+            "immutable_prefix_with_append_only_rows",
+        )
+
+    def test_missing_covered_metadata_row_is_rejected(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-timing-missing-covered-") as temp_dir:
+            root = Path(temp_dir)
+            timing_dir = self.copy_fixture(root)
+            _, timing_rows = read_csv_table(timing_dir / "recording_timing.csv")
+            covered_id = timing_rows[0]["record_id"]
+            metadata_path = root / "metadata.csv"
+            fieldnames, metadata_rows = read_csv_table(metadata_path)
+            removed = [row for row in metadata_rows if row["record_id"] == covered_id]
+            retained = [row for row in metadata_rows if row["record_id"] != covered_id]
+            self.assertEqual(len(removed), 1)
+            retained.append(synthetic_metadata_row(metadata_rows[-1]))
+            self.assertEqual(len(retained), len(metadata_rows))
+            write_csv_table(metadata_path, fieldnames, retained)
+            completed = self.run_validator(root)
+
+        self.assertNotEqual(completed.returncode, 0)
+        self.assertIn(
+            f"{covered_id}: record_id is absent from metadata.csv",
+            completed.stdout,
+        )
+
+    def test_covered_metadata_identity_fields_are_immutable(self) -> None:
+        cases = (
+            (
+                "record_id",
+                "tla-0000000000000000",
+                "record_id is absent from metadata.csv",
+            ),
+            (
+                "file_name",
+                "Standard_Time_Lapses/mutated-covered-row.mp4",
+                "file_path differs from metadata.csv",
+            ),
+            ("hub_xet_hash", "0" * 64, "hub_xet_hash differs from metadata.csv"),
+            ("date", "2099-01-01", "documented finish date differs from metadata.csv"),
+            ("time", "00:00", "documented finish time differs from metadata.csv"),
+        )
+        for field, replacement, expected_error in cases:
+            with self.subTest(field=field):
+                with tempfile.TemporaryDirectory(
+                    prefix=f"tla-timing-covered-{field}-"
+                ) as temp_dir:
+                    root = Path(temp_dir)
+                    timing_dir = self.copy_fixture(root)
+                    _, timing_rows = read_csv_table(timing_dir / "recording_timing.csv")
+                    covered_id = timing_rows[0]["record_id"]
+                    metadata_path = root / "metadata.csv"
+                    fieldnames, metadata_rows = read_csv_table(metadata_path)
+                    target = next(
+                        row for row in metadata_rows if row["record_id"] == covered_id
+                    )
+                    self.assertNotEqual(target[field], replacement)
+                    target[field] = replacement
+                    write_csv_table(metadata_path, fieldnames, metadata_rows)
+                    completed = self.run_validator(root)
+
+                self.assertNotEqual(completed.returncode, 0)
+                self.assertIn(
+                    f"{covered_id}: {expected_error}",
+                    completed.stdout,
+                )
+
+    def test_non_timing_historical_metadata_mutation_is_rejected(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-timing-historical-") as temp_dir:
+            root = Path(temp_dir)
+            timing_dir = self.copy_fixture(root)
+            _, timing_rows = read_csv_table(timing_dir / "recording_timing.csv")
+            timing_ids = {row["record_id"] for row in timing_rows}
+            metadata_path = root / "metadata.csv"
+            fieldnames, metadata_rows = read_csv_table(metadata_path)
+            target = next(
+                row for row in metadata_rows if row["record_id"] not in timing_ids
+            )
+            target["notes"] += " Synthetic mutation."
+            write_csv_table(metadata_path, fieldnames, metadata_rows)
+            completed = self.run_validator(root)
+
+        self.assertNotEqual(completed.returncode, 0)
+        self.assertIn(
+            "metadata.csv pinned prefix differs from the source_manifest receipt",
+            completed.stdout,
+        )
+
+    def test_appended_duplicate_identity_is_rejected(self) -> None:
+        for field in ("record_id", "file_name", "hub_xet_hash"):
+            with self.subTest(field=field):
+                with tempfile.TemporaryDirectory(
+                    prefix=f"tla-timing-duplicate-{field}-"
+                ) as temp_dir:
+                    root = Path(temp_dir)
+                    self.copy_fixture(root)
+                    metadata_path = root / "metadata.csv"
+                    fieldnames, rows = read_csv_table(metadata_path)
+                    duplicate = synthetic_metadata_row(rows[-1])
+                    duplicate[field] = rows[0][field]
+                    with metadata_path.open(
+                        "a", encoding="utf-8", newline=""
+                    ) as handle:
+                        writer = csv.DictWriter(
+                            handle, fieldnames=fieldnames, lineterminator="\n"
+                        )
+                        writer.writerow(duplicate)
+                    completed = self.run_validator(root)
+
+                self.assertNotEqual(completed.returncode, 0)
+                self.assertIn(
+                    f"metadata.csv {field} values must be nonblank and unique",
+                    completed.stdout,
+                )
+
+    def test_appended_malformed_metadata_row_is_rejected(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-timing-malformed-") as temp_dir:
+            root = Path(temp_dir)
+            self.copy_fixture(root)
+            metadata_path = root / "metadata.csv"
+            _, rows = read_csv_table(metadata_path)
+            with metadata_path.open("a", encoding="utf-8", newline="") as handle:
+                handle.write("bad,short,row\n")
+            completed = self.run_validator(root)
+
+        self.assertNotEqual(completed.returncode, 0)
+        self.assertIn(
+            f"metadata.csv row {len(rows) + 2} has malformed field width",
+            completed.stdout,
+        )
+
     def test_full_precision_metric_regression_is_rejected(self) -> None:
         with tempfile.TemporaryDirectory(prefix="tla-timing-metric-") as temp_dir:
             root = Path(temp_dir)

tools/test_semantic_consistency.py

@@ -113,7 +113,7 @@ class SemanticConsistencyTests(unittest.TestCase):
                 self.assertEqual(row["support"], "IllustrationBoard")
                 self.assertIn(".IllustrationBoard.30x40.", row["file_name"])
 
-    def test_protocol_boundary_matches_six_fragment_sidecars(self) -> None:
+    def test_protocol_boundary_matches_seven_fragment_sidecars(self) -> None:
         prospective_ids = {
             row["record_id"]
             for row in self.standard_rows
@@ -134,10 +134,11 @@ class SemanticConsistencyTests(unittest.TestCase):
                 "2026-08-31",
                 "2026-09-01",
                 "2026-09-02",
+                "2026-09-14",
             ],
         )
-        self.assertEqual(len(self.fragment_rows), 186)
-        self.assertEqual(len(self.fragment_record_ids), 186)
+        self.assertEqual(len(self.fragment_rows), 218)
+        self.assertEqual(len(self.fragment_record_ids), 218)
         self.assertEqual(prospective_ids, self.fragment_record_ids)
         self.assertEqual(
             earlier_ids,
@@ -169,7 +170,7 @@ class SemanticConsistencyTests(unittest.TestCase):
                 (metadata["date"], metadata["time"])
             )
 
-        self.assertEqual(len(groups), 25)
+        self.assertEqual(len(groups), 27)
         self.assertTrue(all(len(timestamps) == 1 for timestamps in groups.values()))
         schema = (ROOT / "SCHEMA.md").read_text(encoding="utf-8")
         normalized_schema = re.sub(r"\s+", " ", schema)

tools/validate_recording_timing.py

@@ -6,6 +6,7 @@ from __future__ import annotations
 import argparse
 import csv
 import hashlib
+import io
 import json
 import math
 import re
@@ -101,6 +102,13 @@ EXPECTED_DIRECT = 22
 EXPECTED_CALIBRATED = 164
 EXPECTED_TRANSITIONS = 161
 EXPECTED_SOURCE_REVISION = "b4b58f0ce0effb31ebf7671fbb0bd9c11765db4e"
+EXPECTED_CANONICAL_METADATA_RECEIPT = {
+    "file_path": "metadata.csv",
+    "size_bytes": 370833,
+    "sha256": "d516da7a4341dddf0b2b5ad50f6200f283ea0cdefc6de465882fbc021abfba8a",
+    "field_count": 29,
+    "row_count": 549,
+}
 EXPECTED_SOURCE_SCHEMA_SHA256 = "3624d5858bd4c0df796775ee6400106eb146101acbf112a515ad4a49c3262082"
 EXPECTED_SOURCE_SCHEMA_SIZE = 19411
 EXPECTED_CONFLICT_GROUP = "2026-09-01.0213.BallpointPen.Ink.Paper.9x12"
@@ -148,6 +156,19 @@ def sha256_file(path: Path) -> str:
     return digest.hexdigest()
 
 
+def read_csv_bytes(
+    payload: bytes, label: str
+) -> tuple[list[str], list[dict[str, str]]]:
+    try:
+        text = payload.decode("utf-8-sig")
+    except UnicodeDecodeError as error:
+        raise ValueError(f"invalid UTF-8 CSV bytes for {label}") from error
+    reader = csv.DictReader(io.StringIO(text))
+    if not reader.fieldnames:
+        raise ValueError(f"missing CSV header: {label}")
+    return list(reader.fieldnames), list(reader)
+
+
 def parse_decimal(text: str, label: str, errors: list[str]) -> Decimal | None:
     try:
         value = Decimal(text)
@@ -309,21 +330,53 @@ def validate_source_receipts(
     if not isinstance(canonical_metadata, dict):
         errors.append("source_manifest canonical_metadata is missing")
         return []
-    if canonical_metadata.get("file_path") != "metadata.csv":
-        errors.append("source_manifest canonical metadata path is unexpected")
-    metadata_path = root / str(canonical_metadata.get("file_path", ""))
+    if canonical_metadata != EXPECTED_CANONICAL_METADATA_RECEIPT:
+        errors.append("source_manifest canonical metadata receipt differs")
+    metadata_path = root / EXPECTED_CANONICAL_METADATA_RECEIPT["file_path"]
     if not metadata_path.is_file():
-        errors.append(f"pinned metadata source is missing: {metadata_path}")
+        errors.append(f"current metadata source is missing: {metadata_path}")
         return []
+    metadata_bytes = metadata_path.read_bytes()
+    receipt_size = int(EXPECTED_CANONICAL_METADATA_RECEIPT["size_bytes"])
+    receipt_rows = int(EXPECTED_CANONICAL_METADATA_RECEIPT["row_count"])
+    receipt_fields = int(EXPECTED_CANONICAL_METADATA_RECEIPT["field_count"])
+    if len(metadata_bytes) < receipt_size:
+        errors.append("metadata.csv is shorter than the pinned source_manifest receipt")
+        pinned_prefix = metadata_bytes
+    else:
+        pinned_prefix = metadata_bytes[:receipt_size]
+    if (
+        hashlib.sha256(pinned_prefix).hexdigest()
+        != EXPECTED_CANONICAL_METADATA_RECEIPT["sha256"]
+    ):
+        errors.append("metadata.csv pinned prefix differs from the source_manifest receipt")
+    try:
+        pinned_fields, pinned_rows = read_csv_bytes(
+            pinned_prefix, "metadata.csv pinned prefix"
+        )
+    except ValueError as error:
+        errors.append(str(error))
+        pinned_fields, pinned_rows = [], []
     metadata_fields, metadata_rows = read_csv(metadata_path)
-    if sha256_file(metadata_path) != canonical_metadata.get("sha256"):
-        errors.append("metadata.csv differs from the source_manifest receipt")
-    if metadata_path.stat().st_size != canonical_metadata.get("size_bytes"):
-        errors.append("metadata.csv byte size differs from the source_manifest receipt")
-    if len(metadata_fields) != canonical_metadata.get("field_count"):
-        errors.append("metadata.csv field count differs from the source_manifest receipt")
-    if len(metadata_rows) != canonical_metadata.get("row_count"):
-        errors.append("metadata.csv row count differs from the source_manifest receipt")
+    if len(pinned_fields) != receipt_fields:
+        errors.append(
+            "metadata.csv pinned prefix field count differs from the "
+            "source_manifest receipt"
+        )
+    if len(pinned_rows) != receipt_rows:
+        errors.append(
+            "metadata.csv pinned prefix row count differs from the "
+            "source_manifest receipt"
+        )
+    if metadata_fields != pinned_fields:
+        errors.append("metadata.csv current field contract differs from the pinned prefix")
+    if len(metadata_rows) < receipt_rows:
+        errors.append("metadata.csv current row count is below the pinned source snapshot")
+    if len(metadata_bytes) > receipt_size and len(metadata_rows) == receipt_rows:
+        errors.append("metadata.csv has appended bytes without appended rows")
+    for row_number, row in enumerate(metadata_rows, start=2):
+        if None in row or any(value is None for value in row.values()):
+            errors.append(f"metadata.csv row {row_number} has malformed field width")
 
     source_snapshot_schema = manifest.get("source_snapshot_schema")
     if not isinstance(source_snapshot_schema, dict):
@@ -489,6 +542,10 @@ def main() -> None:
     relationship_rows = validate_source_receipts(root, manifest, errors)
     expected_audit_counts = validate_local_audit_receipts(manifest, errors)
     _, metadata_rows = read_csv(root / "metadata.csv")
+    for field in ("record_id", "file_name", "hub_xet_hash"):
+        values = [row.get(field, "") for row in metadata_rows]
+        if not all(values) or len(values) != len(set(values)):
+            errors.append(f"metadata.csv {field} values must be nonblank and unique")
     metadata_by_id = {row["record_id"]: row for row in metadata_rows}
     canonical_relationships = {
         row["record_id"]: row
@@ -1324,6 +1381,9 @@ def main() -> None:
             {
                 "status": "ok",
                 "source_revision": EXPECTED_SOURCE_REVISION,
+                "metadata_receipt_mode": "immutable_prefix_with_append_only_rows",
+                "pinned_metadata_rows": EXPECTED_CANONICAL_METADATA_RECEIPT["row_count"],
+                "current_metadata_rows": len(metadata_rows),
                 "timing_rows": len(timing_rows),
                 "direct_filename_timestamp_rows": basis_counts[
                     "direct_device_filename_start"