Pith Number

pith:NJ4HXLAJ

pith:2025:NJ4HXLAJY6P7GSYWMYNHEONCBG

not attested not anchored not stored refs pending

Predicting the Past: Estimating Historical Appraisals with OCR and Machine Learning

Asmita Hajra, Junia Howell, Jun Tao Luo, Matthew R. Gormley, Mihir Bhaskar, Zihan Geng

arxiv:2505.24676 v1 · 2025-05-30 · 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{NJ4HXLAJY6P7GSYWMYNHEONCBG}

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	2026-07-05T11:12:54.452919Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a787bac09c79ff34b16661a7239a209a9ffd759103ab0a2e4cf93b0f5a26df0

Aliases

arxiv: 2505.24676 · arxiv_version: 2505.24676v1 · doi: 10.48550/arxiv.2505.24676 · pith_short_12: NJ4HXLAJY6P7 · pith_short_16: NJ4HXLAJY6P7GSYW · pith_short_8: NJ4HXLAJ

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/NJ4HXLAJY6P7GSYWMYNHEONCBG \
  | 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: 6a787bac09c79ff34b16661a7239a209a9ffd759103ab0a2e4cf93b0f5a26df0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c9cc1cdd99139352b2a21d95ac060fb57d629447f9dd220cc0b0b4333aa5493d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-05-30T15:04:21Z",
    "title_canon_sha256": "c0f79a1cff3b6f3694f24f3420dfc0e7b36632b4cb8d837ae6c6f28b8775db83"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.24676",
    "kind": "arxiv",
    "version": 1
  }
}