Pith Number

pith:U3LGDKPF

pith:2025:U3LGDKPFZYFJAY2HVZILZVDZKT

not attested not anchored not stored refs pending

Origin Tracer: A Method for Detecting LoRA Fine-Tuning Origins in LLMs

Hongyu Liang, Shiyu Liang, Yihan Li, Yiran Zhang, Yuting Zheng

arxiv:2505.19466 v1 · 2025-05-26 · cs.AI · 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{U3LGDKPFZYFJAY2HVZILZVDZKT}

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	2026-07-05T11:09:30.668335Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6d661a9e5ce0a906347ae50bcd47954c7027b25f742ec02ede8069fd38c56cd

Aliases

arxiv: 2505.19466 · arxiv_version: 2505.19466v1 · doi: 10.48550/arxiv.2505.19466 · pith_short_12: U3LGDKPFZYFJ · pith_short_16: U3LGDKPFZYFJAY2H · pith_short_8: U3LGDKPF

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/U3LGDKPFZYFJAY2HVZILZVDZKT \
  | 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: a6d661a9e5ce0a906347ae50bcd47954c7027b25f742ec02ede8069fd38c56cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65b9ab086d6e09b71d6bb3504ca3527bfcef021c5463912638752140e1be0334",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2025-05-26T03:38:14Z",
    "title_canon_sha256": "09727870cc1dca8dc638bce2fef8d988ad3c3978b861ce7996a8d545232a30f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.19466",
    "kind": "arxiv",
    "version": 1
  }
}