The dataset viewer is not available for this split.
Error code: StreamingRowsError
Exception: ValueError
Message: Expected object or value
Traceback: Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 290, in _generate_tables
pa_table = paj.read_json(
io.BytesIO(batch), read_options=paj.ReadOptions(block_size=block_size)
)
File "pyarrow/_json.pyx", line 364, in pyarrow._json.read_json
File "pyarrow/error.pxi", line 155, in pyarrow.lib.pyarrow_internal_check_status
File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
raise convert_status(status)
pyarrow.lib.ArrowInvalid: JSON parse error: Column(/rows/[]/identity/decimals) changed from string to number in row 0
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
return get_rows(
dataset=dataset,
...<4 lines>...
column_names=column_names,
)
File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
return func(*args, **kwargs)
File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
File "/src/services/worker/src/worker/utils.py", line 483, in safe_iter
yield from ds.decode(False) if ds.features else ds
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2951, in __iter__
for key, example in ex_iterable:
^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2461, in __iter__
for key, pa_table in self._iter_arrow():
~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2486, in _iter_arrow
for key, pa_table in self.ex_iterable._iter_arrow():
~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 547, in _iter_arrow
for key, pa_table in iterator:
^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 430, in _iter_arrow
for key, pa_table in self.generate_tables_fn(**gen_kwags):
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 304, in _generate_tables
batch = json_encode_fields_in_json_lines(original_batch, json_field_paths)
File "/usr/local/lib/python3.14/site-packages/datasets/utils/json.py", line 111, in json_encode_fields_in_json_lines
examples = [ujson_loads(line) for line in original_batch.splitlines()]
~~~~~~~~~~~^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/utils/json.py", line 20, in ujson_loads
return pd.io.json.ujson_loads(*args, **kwargs)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
ValueError: Expected object or valueNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
Cross-ledger supply — 2026-09-25
Question. For a token its issuer says lives on several ledgers: does each deployment the issuer
itself lists resolve as that token, and what supply (totalSupply() or the ledger's equivalent) does each
ledger's own state show?
Published by the Council of AI (CSOAI), an independent measurement layer. We measure; we never
certify. No institution named here is a client, partner or member of anything of ours.
What it is NOT
An on-chain supply read is not AUM, NAV, ownership, redeemability, fund compliance, settlement
finality, reserves or backing. It is the ledger's totalSupply() (or equivalent) at a recorded height on one
ledger, which includes any tokens the issuer itself holds; it is not issued or circulating supply. It must
be reconciled against the controlling record (a fund's transfer-agent register, a bank's deposit
ledger); no such reconciliation exists here, and every record says so
(reconciliation_state, e.g. UNRECONCILED_WITH_TRANSFER_AGENT). An issuer's own figure is kept in a
separate issuer_reported block, never merged with measured supply — the issuer's statement is the
claim, not the evidence.
Method
- Deployment list only from the issuer's own public page (URL, fetched_at, sha256 of the bytes in
each record). If no issuer-published list exists:
ISSUER_LIST_UNAVAILABLE, nothing read (explorer/aggregator addresses are not issuer lists). If the issuer says the token lives on a private ledger:PERMISSIONED_NOT_READABLE, with the issuer's sentence. - Each deployment is read from its ledger's public endpoints. EVM: the
totalSupplystorage slot is found empirically over a declared candidate set (slots 0..64 + the OpenZeppelin ERC-7201 ERC20 namespace), proven witheth_getProofand verified in the reader against the stateRoot of a block whose hash the reader recomputes from the header fields. Stellar, Solana, Aptos, Sui, XRPL, Hedera: operator APIs, with a second independent operator where a keyless one exists. - Identity: the on-ledger symbol / asset code / metadata symbol must equal the product ticker the
issuer page names, else
REJECTEDand no supply is counted. - Sums per product and per evidence kind only. Products on one issuer page (BENJI, iBENJI, gBENJI, …) are different instruments and are never added.
Evidence ladder
| kind | meaning |
|---|---|
STATE_PROOF_VERIFIED |
Merkle proof verified here against the stateRoot of a header whose hash was recomputed here; proven value == API value. Header not checked against consensus; an L2 header is not checked against L1. |
STATE_PROOF_RECORDED |
proof kept but not fully verified (failed, or the header hash could not be recomputed for that chain's header format); reason in the row |
OPERATOR_API |
one operator's answer; two_operators_agree records a second independent operator. Agreement is not a proof. |
UNCHECKABLE |
read failed; error kept. Never zero, never absent. |
REJECTED |
identity did not match; no supply counted |
Reads
| record (issuer page) | product | ledger | supply (token units) | evidence | two operators agree | height |
|---|---|---|---|---|---|---|
| USDC | USDC | ethereum | 50430781860.131977 | STATE_PROOF_VERIFIED |
true | 26051941 |
| USDC | USDC | solana | 8217034486.977972 | OPERATOR_API |
true | 450242496 |
| USDC | USDC | stellar | 351156763.2854447 | OPERATOR_API |
true | 64604829 |
| USDC | USDC | hedera | 450010110.000000 | OPERATOR_API |
NOT_TRIED | 100361996 |
| USDC | USDC | sui | 308316102.717780 | OPERATOR_API |
true | 326606936 |
| USDC | USDC | noble | 103762748.544811 | STATE_PROOF_VERIFIED |
true | 60056091 |
| USDC | USDC | xrpl | 4617919.108900781 | OPERATOR_API |
true | 107218481 |
| USDC | USDC | arbitrum | 2936979871.811699 | OPERATOR_API |
NOT_TRIED | 508654840 |
| USDC | USDC | avalanche | 400293471.158739 | OPERATOR_API |
NOT_TRIED | 96099554 |
| USDC | USDC | base | 4294533060.719965 | OPERATOR_API |
NOT_TRIED | 51760296 |
| USDC | USDC | celo | 15228623.488166 | OPERATOR_API |
NOT_TRIED | 78409182 |
| USDC | USDC | hyperevm | 6833999685.532186 | OPERATOR_API |
NOT_TRIED | 46821059 |
| USDC | USDC | linea | 24249450.507182 | OPERATOR_API |
NOT_TRIED | 32136842 |
| USDC | USDC | optimism | 166249049.371377 | OPERATOR_API |
NOT_TRIED | 157355585 |
| USDC | USDC | polygon | 605542291.149054 | OPERATOR_API |
NOT_TRIED | 94403206 |
| USDC | USDC | sonic | 126238586.178445 | OPERATOR_API |
NOT_TRIED | 79869922 |
| USDC | USDC | unichain | 23588472.591813 | OPERATOR_API |
NOT_TRIED | 59561588 |
| USDC | USDC | zksync | 10636491.412155 | OPERATOR_API |
NOT_TRIED | 72209107 |
| BENJI | BENJI | stellar | 430691880.4855482 | OPERATOR_API |
true | 64609792 |
| BENJI | BENJI | polygon | 32206461.812513615916650543 | STATE_PROOF_VERIFIED |
true | 94419754 |
| BENJI | BENJI | arbitrum | 47950819.162464907015564307 | STATE_PROOF_VERIFIED |
true | 508744906 |
| BENJI | BENJI | avalanche | 34309356.142162081852426527 | STATE_PROOF_RECORDED |
true | 96120688 |
| BENJI | BENJI | aptos | 14713483.381624994 | OPERATOR_API |
true | 7356338123 |
| BENJI | BENJI | ethereum | 48209314.242417926951548284 | STATE_PROOF_VERIFIED |
true | 26054009 |
| BENJI | BENJI | base | 59725674.950165151280437460 | STATE_PROOF_VERIFIED |
true | 51772802 |
| BENJI | BENJI | solana | 209512.057557357 | OPERATOR_API |
true | 450336516 |
| BENJI | gBENJI | stellar | 56720355.5672037 | OPERATOR_API |
true | 64609839 |
| BENJI | iBENJI | ethereum | 195922530.492655972484309178 | STATE_PROOF_VERIFIED |
true | 26054041 |
| BENJI | iBENJI | bsc | 1524087437.202981538514940268 | STATE_PROOF_VERIFIED |
true | 123939466 |
| BENJI | sgBENJI | stellar | 24352527.5694453 | OPERATOR_API |
true | 64609854 |
| BENJI | grBENJI | stellar | 516072.2845994 | OPERATOR_API |
true | 64609855 |
| JPMD | JPMD | base | 1001000.00 | STATE_PROOF_VERIFIED |
true | 51772880 |
| BUIDL | — | — | — | ISSUER_LIST_UNAVAILABLE |
— | — |
| Citi Token Services (tokenized deposits) | — | — | — | PERMISSIONED_NOT_READABLE |
— | — |
| HSBC Tokenised Deposit Service | — | — | — | PERMISSIONED_NOT_READABLE |
— | — |
| BNY digital cash / tokenized deposits | — | — | — | PERMISSIONED_NOT_READABLE |
— | — |
Issuer-reported (kept apart)
BENJI's fund (Franklin OnChain U.S. Government Money Fund, series S000067043) reports in its
SEC N-MFP3 for 2026-08-31 (filed 2026-09-04, accession 0002071691-26-021281):
net assets USD 686635362.22, shares outstanding 686637083.5800; transfer
agent named in the filing: Franklin Templeton Investor Services LLC. Not compared with the ledger reads:
different date, a share count is not a ledger supply, and no transfer-agent register is public.
Records, signatures, timestamps
| asset | issuer list | signed_at (Ed25519, did:web:csoai.org#board-attestation-1) | OpenTimestamps |
|---|---|---|---|
| usdc | READ |
2026-09-25T11:22:18.153Z | PENDING_CALENDAR_COMMITMENT |
| benji | READ |
2026-09-25T11:22:15.085Z | PENDING_CALENDAR_COMMITMENT |
| jpmd | READ |
2026-09-25T11:22:17.940Z | PENDING_CALENDAR_COMMITMENT |
| buidl | ISSUER_LIST_UNAVAILABLE |
2026-09-25T11:22:16.580Z | PENDING_CALENDAR_COMMITMENT |
| citi-token-services | PERMISSIONED_NOT_READABLE |
2026-09-25T11:22:17.186Z | PENDING_CALENDAR_COMMITMENT |
| hsbc-tokenised-deposit-service | PERMISSIONED_NOT_READABLE |
2026-09-25T11:22:17.529Z | PENDING_CALENDAR_COMMITMENT |
| bny-digital-cash | PERMISSIONED_NOT_READABLE |
2026-09-25T11:22:16.030Z | PENDING_CALENDAR_COMMITMENT |
The USDC record is the 2026-09-25 04:18Z pilot run, bytes unchanged; it was signed later the same day
(its internal "unsigned" status line describes the run, not the signature). institutional-evidence-links.json
maps the estate's institutional binding keys to these records, or to UNMEASURED with the reason.
Paths: a record's site path /interop/X is dataset path interop/X. cross_ledger_assets.json is the
asset registry (asset → issuer list → per-ledger adapter) the reader ran from.
How to verify
Signature. In X.signed.json: serialise payload as JSON, keys sorted recursively, no whitespace,
UTF-8; its sha256 must equal signature.payload_sha256; payload.artifact.sha256 must equal sha256 of
X.json. Verify signature.sig_ed25519 (hex) with the #board-attestation-1 Ed25519 key
(publicKeyJwk.x, base64url) in https://csoai.org/.well-known/did.json. Change one byte: it must fail.
import json, hashlib, base64, urllib.request
from cryptography.hazmat.primitives.asymmetric import ed25519
s = json.load(open("interop/cross-ledger-benji-2026-09-25.signed.json"))
c = json.dumps(s["payload"], sort_keys=True, separators=(",", ":"), ensure_ascii=False).encode()
assert hashlib.sha256(c).hexdigest() == s["signature"]["payload_sha256"]
assert hashlib.sha256(open("interop/cross-ledger-benji-2026-09-25.json", "rb").read()).hexdigest() == s["payload"]["artifact"]["sha256"]
# csoai.org answers 403 to Python's default User-Agent, so send a named one
did = json.load(urllib.request.urlopen(urllib.request.Request("https://csoai.org/.well-known/did.json", headers={"User-Agent": "csoai-dataset-verify/1.0 (+https://huggingface.co/csoai)"})))
x = [m for m in did["verificationMethod"] if m["id"].endswith("#board-attestation-1")][0]["publicKeyJwk"]["x"]
ed25519.Ed25519PublicKey.from_public_bytes(base64.urlsafe_b64decode(x + "==")).verify(bytes.fromhex(s["signature"]["sig_ed25519"]), c)
Proofs. Each interop/cross-ledger-<asset>-2026-09-25/<ledger>-<product>-proof.json carries the header,
the eth_getProof response and how_to_check: keccak(rlp(header)) == block_hash; walk accountProof from
stateRoot along keccak(address); storageRoot == storageHash; walk storageProof along keccak(slot); leaf ==
rlp(totalSupply). No trust in us is needed for that step; trust in the header remains (no light client).
Timestamp. ots upgrade X.json.ots then ots verify X.json.ots. At publication each proof held pending
calendar attestations: a pending calendar commitment, not a Bitcoin attestation.
Without a Bitcoin node (a full ots verify needs one), check an upgraded proof offline and compare the merkle root with a
public block explorer (two independent ones is better):
# (a pending proof must first be upgraded: ots upgrade <proof>)
ots --no-bitcoin verify -f interop/cross-ledger-usdc-2026-09-25.json interop/cross-ledger-usdc-2026-09-25.json.bitcoin.ots
# -> "To verify manually, check that Bitcoin block H has merkleroot M"
B=$(curl -s -A "csoai-dataset-verify/1.0 (+https://huggingface.co/csoai)" https://mempool.space/api/block-height/H)
curl -s -A "csoai-dataset-verify/1.0 (+https://huggingface.co/csoai)" https://mempool.space/api/block/$B | python3 -c 'import sys,json;print(json.load(sys.stdin)["merkle_root"])'
# must print M; repeat against https://blockstream.info/api/...
Contact, objections and re-checks
- Contact: nicholas@csoai.org (Council of AI / CSOAI). Please name this dataset and the contract, ledger or issuer page you mean.
- Ask for a re-check. Reply with the contract, ledger or issuer page. We re-measure it with the same read-only instrument and run a tamper control beside it (a deliberately altered copy must fail the same check, or the re-check does not count). A dated re-check record is published only with your knowledge. Published rows are never edited in place: a correction is a new, signed file that supersedes the old one, and both stay visible.
- Object, or opt out of future reads. Name the contract, ledger or issuer page. It is added to the exclusion list
(
scripts/census/probe-exclusions.jsonin the census code, dated, public), and the next run honours it before sending any request and records the skip by name. The reader behind this dataset (scripts/readers/cross_ledger_funds.py) does not yet read that list in code; until it does, an entry is honoured by hand before the next run, and the skip is still recorded by name. - Objections are recorded. Every objection, opt-out and re-check request is logged with its date and what was done; nothing is removed silently.
Changelog
- 2026-09-26 — correction C-2026-0926-06:
xl-daily/2026-09-26/v2/supersedesxl-daily/2026-09-26/. The daily recordxl-daily/2026-09-26/xl-daily-2026-09-26.json(sha256b02851fcbc8ea5ad6460c6c847e8af9eaec74d36a09121989590dc180a5d700d, dataset commitd58a0a7b) graded three Tether deploymentsINCONSISTENT: EUR₮ on Ethereum, CNH₮ on Ethereum and CNH₮ on Tron. The reason given was that Tether's supported-protocols page lists them under "Deprecated Asset Protocols:" while their ledgers showtotalSupply()of 50,000,050, 25,000,000 and 20,000,000. "Deprecated" states no supply figure, so there were never two statements that differ. The three rows are nowNOT_A_SUPPLY_CLAIM(recorded, not compared), and the USDT record's parity state isUNCHECKABLE(some of its listed deployments are not read), notINCONSISTENT. The record also calledtotalSupply()"issued supply". In Tether's own termstotalSupply()is "total authorized", which includes tokens the issuer holds as not issued, so the record now saystotalSupply()(or the ledger's equivalent). This card's two uses of "issued supply" are corrected the same way. The corrected recordxl-daily/2026-09-26/v2/xl-daily-2026-09-26.json(sha2566acf5f9e976e790efef2ce459e0cc47e1234443ce4b198ce45840ec29a8238e1) was re-derived from the same reads. No ledger, issuer page or value source was re-read, and every supply figure, height and evidence kind is unchanged.xl-daily/2026-09-26/correction-C-2026-0926-06.diff.jsonlists every changed path. The original record stays published byte for byte with its signature and timestamp proof. This says nothing about Tether's reserves, solvency or redemptions. Ledger entry: https://councilof.ai/api/corrections (C-2026-0926-06).
Citation
@misc{csoai_cross_ledger_supply_2026,
author = {{Council of AI (CSOAI)}},
title = {Cross-ledger supply: issuer-listed deployments, 2026-09-25},
year = {2026},
publisher = {Hugging Face},
howpublished = {\url{https://huggingface.co/datasets/csoai/cross-ledger-supply}}
}
Licence
CC-BY-4.0. Cite as: Council of AI (CSOAI), Cross-ledger supply, issuer-listed deployments, 2026-09-25,
csoai/cross-ledger-supply. Reader: scripts/readers/cross_ledger_funds.py (councilof-ai repository).
Timestamp status
Checked 2026-09-25T13:57Z by ots upgrade on a copy of each published pending proof. A pending .ots is never rewritten: an upgraded proof is published as a NEW file <name>.bitcoin.ots beside it. BITCOIN_ATTESTED means the proof carries a BitcoinBlockHeaderAttestation whose commitment (byte-reversed) equals the merkle root of the block header at that height as served by two independent public sources (blockstream.info and mempool.space; each raw header also double-SHA256s to the block hash it is served under). No local Bitcoin node was used. Details: ots-bitcoin-check-2026-09-25.json.
interop/cross-ledger-benji-2026-09-25.json(sha25651ec46fbe5ab0d30d0a68ed35bb63ee48517a08a9f7cc4b751b415c9544fed77): BITCOIN_ATTESTED at block 968549 (checked against 2 header sources: blockstream.info, mempool.space). Upgraded proof:interop/cross-ledger-benji-2026-09-25.json.bitcoin.ots(sha25688a562149a503679c2d2c95f7054396c1a4050f11ed1f0be07250edb5b578b77); the published pending proofinterop/cross-ledger-benji-2026-09-25.json.otsis unchanged.interop/cross-ledger-bny-digital-cash-2026-09-25.json(sha256ec9bf90130e449a01c4814a697dac351a02abc832cd2c426db3255ef1bbf03c9): BITCOIN_ATTESTED at block 968549 (checked against 2 header sources: blockstream.info, mempool.space). Upgraded proof:interop/cross-ledger-bny-digital-cash-2026-09-25.json.bitcoin.ots(sha2568ce63ae7b3c5ffc491a5c31781a79e1f7eb5a69043dbe5476b4611e65d463d5d); the published pending proofinterop/cross-ledger-bny-digital-cash-2026-09-25.json.otsis unchanged.interop/cross-ledger-buidl-2026-09-25.json(sha256cf280c0b6c99359e86767c0f646a287835b33ee6c34bc2a46164c2c23034db56): BITCOIN_ATTESTED at block 968549 (checked against 2 header sources: blockstream.info, mempool.space). Upgraded proof:interop/cross-ledger-buidl-2026-09-25.json.bitcoin.ots(sha256e117c4c6b258b9b0300338e2c99b7e96d1775fa09c14255381c3312835e297d1); the published pending proofinterop/cross-ledger-buidl-2026-09-25.json.otsis unchanged.interop/cross-ledger-citi-token-services-2026-09-25.json(sha256796c03215483b769e07354b488109e9b1c58a25e3b1653c43745f825d265bcab): BITCOIN_ATTESTED at block 968549 (checked against 2 header sources: blockstream.info, mempool.space). Upgraded proof:interop/cross-ledger-citi-token-services-2026-09-25.json.bitcoin.ots(sha256deb8a6abf11e3942e7c9a310be9560f1c4309b5d62395d843e4e9d1d6b56cf27); the published pending proofinterop/cross-ledger-citi-token-services-2026-09-25.json.otsis unchanged.interop/cross-ledger-hsbc-tokenised-deposit-service-2026-09-25.json(sha25648dd4f9722bd1d27836fa65cfc4081b45c41eee51fea7d686b3483fd7ac364e3): BITCOIN_ATTESTED at block 968549 (checked against 2 header sources: blockstream.info, mempool.space). Upgraded proof:interop/cross-ledger-hsbc-tokenised-deposit-service-2026-09-25.json.bitcoin.ots(sha256d2c98df75c87b1776f1b3924633f457f3c1d8108415720a8fe81f58ffcf51fad); the published pending proofinterop/cross-ledger-hsbc-tokenised-deposit-service-2026-09-25.json.otsis unchanged.interop/cross-ledger-jpmd-2026-09-25.json(sha256ce0e151f6dd0806c9daa691f220684547e0290200679ae5e778d81866eda106b): BITCOIN_ATTESTED at block 968549 (checked against 2 header sources: blockstream.info, mempool.space). Upgraded proof:interop/cross-ledger-jpmd-2026-09-25.json.bitcoin.ots(sha25688f6d1a59944e85a406a0a04e8fff926162d6b00643cb93779af329a38cf7416); the published pending proofinterop/cross-ledger-jpmd-2026-09-25.json.otsis unchanged.interop/cross-ledger-usdc-2026-09-25.json(sha2561a1009dc98a6a459d00e9f34a1581c295a0f803d832111b04531513ad642b63a): BITCOIN_ATTESTED at block 968549 (checked against 2 header sources: blockstream.info, mempool.space). Upgraded proof:interop/cross-ledger-usdc-2026-09-25.json.bitcoin.ots(sha256e30131ab616af7f6efbef57259196edaec179b34a9ae7bb95e3157ec47e7e927); the published pending proofinterop/cross-ledger-usdc-2026-09-25.json.otsis unchanged.interop/institutional-evidence-links.json(sha25693bf6eae5289f0d000363ef512a91d84ae583d4f6ee43fe57678f724bf45fbf3): BITCOIN_ATTESTED at block 968549 (checked against 2 header sources: blockstream.info, mempool.space). Upgraded proof:interop/institutional-evidence-links.json.bitcoin.ots(sha256c7afad76ca87c4b289260a3020bc5252a41a550330f355f00a70a4e4a8b229c1); the published pending proofinterop/institutional-evidence-links.json.otsis unchanged.
How to cite
CSOAI Ltd (Council of AI). Cross-ledger supply (issuer-listed deployments, evidence-labelled). 2026. Hugging Face dataset csoai/cross-ledger-supply. https://huggingface.co/datasets/csoai/cross-ledger-supply
@misc{csoai_cross_ledger_supply,
title = {Cross-ledger supply (issuer-listed deployments, evidence-labelled)},
author = {{CSOAI Ltd}},
year = {2026},
howpublished = {Hugging Face dataset, https://huggingface.co/datasets/csoai/cross-ledger-supply},
note = {Corrections: https://councilof.ai/api/corrections}
}
Licence: CC-BY-4.0. Attribute Council of AI, CSOAI Ltd (16939677), https://councilof.ai.
Corrections and verification
- Corrections ledger (signed): https://councilof.ai/api/corrections. Corrections to CSOAI's published records are logged there with what changed and when.
- Verify a signed record yourself, free and without an account: https://councilof.ai/gspc-verify/ (step by step: https://councilof.ai/signed/HOW-TO-VERIFY.md).
- Conformance kit for signed-receipts/v1, with test vectors for implementers: https://councilof.ai/spec/signed-receipts/v1/conformance/
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