Pith Number

pith:TMQYUJLV

pith:2026:TMQYUJLVSFOTOY7BF4SBVCLE3H

not attested not anchored not stored refs pending

Hack-Verifiable Environments: Towards Evaluating Reward Hacking at Scale

Amit Roth, Ankur Samanta, Matan Halevy, Yoav Levine, Yonathan Efroni

arxiv:2605.20744 v1 · 2026-05-20 · cs.LG · cs.AI

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TMQYUJLVSFOTOY7BF4SBVCLE3H}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-21T01:04:51.881137Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9b218a2575915d3763e12f241a8964d9e9f4f45121078606b7defffe5879c306

Aliases

arxiv: 2605.20744 · arxiv_version: 2605.20744v1 · doi: 10.48550/arxiv.2605.20744 · pith_short_12: TMQYUJLVSFOT · pith_short_16: TMQYUJLVSFOTOY7B · pith_short_8: TMQYUJLV

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/TMQYUJLVSFOTOY7BF4SBVCLE3H \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 9b218a2575915d3763e12f241a8964d9e9f4f45121078606b7defffe5879c306

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ccf27647ca044b771adc0168f87d893d0e04b23eaff44601efae0d2ea2b80720",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-05-20T05:46:52Z",
    "title_canon_sha256": "ff5952a0782a4f82d008f6b9aa8b23f902160f2a4cf95d62571be7febb17754b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.20744",
    "kind": "arxiv",
    "version": 1
  }
}