Pith Number

pith:CPKJ2WVN

pith:2026:CPKJ2WVNVEIUDV7LWPFR3CREUE

not attested not anchored not stored refs pending

CANARY: Zero-Label Detection of Fine-Tuning Contamination in Language Models

Swapnil Parekh

arxiv:2606.01695 v1 · 2026-06-01 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CPKJ2WVNVEIUDV7LWPFR3CREUE}

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	2026-06-02T02:04:40.235451Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13d49d5aada91141d7ebb3cb1d8a24a120a1f935db842e99a97d007bdecf898d

Aliases

arxiv: 2606.01695 · arxiv_version: 2606.01695v1 · doi: 10.48550/arxiv.2606.01695 · pith_short_12: CPKJ2WVNVEIU · pith_short_16: CPKJ2WVNVEIUDV7L · pith_short_8: CPKJ2WVN

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/CPKJ2WVNVEIUDV7LWPFR3CREUE \
  | 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: 13d49d5aada91141d7ebb3cb1d8a24a120a1f935db842e99a97d007bdecf898d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9829cc3668d63018b3142f18355edda959f21154d21e97087b8d438f55dcb91",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-06-01T05:01:01Z",
    "title_canon_sha256": "beed17607f96cecf05e6e0ec6ce2a2997b46a5e3220ad92402653b7ca76bd1f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.01695",
    "kind": "arxiv",
    "version": 1
  }
}