Pith Number

pith:7JC4UHET

pith:2026:7JC4UHETZJHFPI7KRA4CNM6X4A

not attested not anchored not stored refs pending

MC-PDD: Masked Corpus-Level Pretraining Data Detection for Black-Box Large Language Models

Binkai Ou, Derek F. Wong, Kaixin Lan, Lidia S. Chao, Mu You, Tao Fang

arxiv:2606.07996 v1 · 2026-06-06 · cs.CL · 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{7JC4UHETZJHFPI7KRA4CNM6X4A}

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	2026-06-09T01:05:22.010411Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa45ca1c93ca4e57a3ea883826b3d7e0365d95a085ec7a978f3ae1fe23aa6a2f

Aliases

arxiv: 2606.07996 · arxiv_version: 2606.07996v1 · doi: 10.48550/arxiv.2606.07996 · pith_short_12: 7JC4UHETZJHF · pith_short_16: 7JC4UHETZJHFPI7K · pith_short_8: 7JC4UHET

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/7JC4UHETZJHFPI7KRA4CNM6X4A \
  | 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: fa45ca1c93ca4e57a3ea883826b3d7e0365d95a085ec7a978f3ae1fe23aa6a2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d540930f8342571ef443eaba397762d3d8c31ac3648b789642c7fb77de0fe92c",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-06-06T06:27:54Z",
    "title_canon_sha256": "37b109bdab4f7a421235dc199045b812187455d4f2aab82525aff9a537a82b92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.07996",
    "kind": "arxiv",
    "version": 1
  }
}