Pith Number

pith:ZKULB5PC

pith:2026:ZKULB5PC3PGRUEYH5PXFSEKC7O

not attested not anchored not stored refs pending

The Moving Target: A Longitudinal Audit of Trustworthiness Drift Across Twelve Checkpoints of Open-Source Chat LLMs

Xian Sun, Yanhang Li, Yingshuo Wang, Zexin Zhuang, Zhichao Fan

arxiv:2607.02587 v1 · 2026-07-01 · cs.SE · 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{ZKULB5PC3PGRUEYH5PXFSEKC7O}

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	2026-07-07T00:16:01.749138Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

caa8b0f5e2dbcd1a1307ebee591142fbbd01f497a9f695ecacb9b468a9d8e5b5

Aliases

arxiv: 2607.02587 · arxiv_version: 2607.02587v1 · doi: 10.48550/arxiv.2607.02587 · pith_short_12: ZKULB5PC3PGR · pith_short_16: ZKULB5PC3PGRUEYH · pith_short_8: ZKULB5PC

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/ZKULB5PC3PGRUEYH5PXFSEKC7O \
  | 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: caa8b0f5e2dbcd1a1307ebee591142fbbd01f497a9f695ecacb9b468a9d8e5b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec9b92128909e40914d97f755c73bcb35a58a0593868abbd7efe307fe03c77a0",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2026-07-01T05:44:48Z",
    "title_canon_sha256": "bfd5a26ee473bfb6e03e0f978165ff12b99f836cc42d24763ccfa4bd128ff3df"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.02587",
    "kind": "arxiv",
    "version": 1
  }
}