Pith Number

pith:U6AX37ZC

pith:2025:U6AX37ZCSGISHFET7RTZGVEYO6

not attested not anchored not stored refs pending

You've Changed: Detecting Modification of Black-Box Large Language Models

Alden Dima, James Foulds, Philip Feldman, Shimei Pan

arxiv:2504.12335 v1 · 2025-04-14 · 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{U6AX37ZCSGISHFET7RTZGVEYO6}

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.

Cited by

1 paper in Pith

Referential Security as a New Paradigm for AI Evaluations

Receipt and verification

First computed	2026-07-05T10:50:14.329571Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7817dff229191239493fc6793549877b1a75848767ba4651efebc6866eea686

Aliases

arxiv: 2504.12335 · arxiv_version: 2504.12335v1 · doi: 10.48550/arxiv.2504.12335 · pith_short_12: U6AX37ZCSGIS · pith_short_16: U6AX37ZCSGISHFET · pith_short_8: U6AX37ZC

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/U6AX37ZCSGISHFET7RTZGVEYO6 \
  | 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: a7817dff229191239493fc6793549877b1a75848767ba4651efebc6866eea686

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30dd8167537c9b0c1cdcb1015db926c2566720ed00cfe8b40ea71a9e894aac85",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2025-04-14T04:16:43Z",
    "title_canon_sha256": "94b92e16fde90326b1f5bd614cd436e6ea18d13175d628e0cb4c7c96d4eab113"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.12335",
    "kind": "arxiv",
    "version": 1
  }
}