Update competition links and license in README

README.md

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+---
+license: cc-by-4.0
+---
+
 <p align="center">
   <img src="assets/assemble_parts_overview.gif" alt="RoCo Task Board Assembly overview" width="100%">
 </p>
@@ -25,7 +29,7 @@
 
 Task-board assembly requires precise part localization, fine contact timing, bimanual coordination, and robust perception under hand-object occlusion. The demonstrations include synchronized multi-view video, tactile observations, proprioceptive state, torque signals, and action targets.
 
-This dataset supports the [RoCo IROS 2026 Challenge](https://rocochallenge.github.io/RoCo-IROS2026/). Teams can register through the official [registration form](https://forms.gle/d2NKNAE7dqSfYZB87).
+This dataset supports the [RoCo IROS 2026 Challenge](https://rocochallenge.github.io/RoCo-IROS2026/). Teams can use it to develop, train, and evaluate policies for the task-board assembly track. Interested participants should visit the official competition website and complete the [registration form](https://forms.gle/d2NKNAE7dqSfYZB87) to receive challenge updates and participation details.
 
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+## Competition and Registration
+
+The RoCo IROS 2026 Challenge provides a shared benchmark for real-world robotic assembly, focusing on contact-rich manipulation, bimanual coordination, visual-tactile perception, and robust policy execution. The task-board assembly dataset is released as training data for teams participating in the challenge and for researchers working on related manipulation problems.
+
+- Competition website: [https://rocochallenge.github.io/RoCo-IROS2026/](https://rocochallenge.github.io/RoCo-IROS2026/)
+- Registration form: [https://forms.gle/d2NKNAE7dqSfYZB87](https://forms.gle/d2NKNAE7dqSfYZB87)
+
+Please refer to the competition website for the latest schedule, rules, evaluation details, and participation instructions.
+
 ## Dataset Capabilities
 
 | Capability | Dataset Support |
@@ -353,7 +366,9 @@ observation.images.tactile_raw
 
 ## License and Terms
 
-Please follow the license and usage terms specified by this Hugging Face dataset repository. If you use the dataset for challenge participation, also follow the official competition rules and evaluation protocol.
+This dataset is released under the [Creative Commons Attribution 4.0 International License (CC-BY-4.0)](https://creativecommons.org/licenses/by/4.0/). You may use, share, and adapt the dataset, including for commercial purposes, provided that you give appropriate attribution.
+
+If you use the dataset for RoCo IROS 2026 Challenge participation, please also follow the official competition rules and evaluation protocol.
 
 ## Citation