Add dataset card and link to paper

README.md

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+---
+license: mit
+task_categories:
+- question-answering
+---
+
+# CorVer-infini-gram-index
+
+This repository contains the prebuilt Wikipedia infini-gram index (tokenized with Llama-2) used for **CorVer** (*Corpus Verify*), a lightweight process reward for reinforcement learning fine-tuning on factual question answering. 
+
+The dataset was introduced in the paper [Verifiable Rewards Beyond Math and Code: Lightweight Corpus-Grounded Process Supervision for Factual Question Answering](https://huggingface.co/papers/2605.29648).
+
+- **GitHub Repository**: [https://github.com/shichengf/CorVer](https://github.com/shichengf/CorVer)
+- **Paper**: [https://huggingface.co/papers/2605.29648](https://huggingface.co/papers/2605.29648)
+
+## Sample Usage
+
+You can download the index using the `huggingface-cli`:
+
+```bash
+huggingface-cli download Shichengf/CorVer-infini-gram-index \
+    --repo-type dataset --local-dir ./infigram_index
+export INFIGRAM_LOCAL_INDEX_DIR=./infigram_index
+```
+
+## Citation
+
+```bibtex
+@misc{fan2026corver,
+      title  = {Verifiable Rewards Beyond Math and Code: Lightweight Corpus-Grounded Process Supervision for Factual Question Answering},
+      author = {Shicheng Fan and Haochang Hao and Dehai Min and Weihao Liu and Philip S. Yu and Lu Cheng},
+      year   = {2026},
+      eprint = {2605.29648},
+      archivePrefix = {arXiv},
+      primaryClass = {cs.CL},
+      url    = {https://arxiv.org/abs/2605.29648},
+}
+```