Pith Number

pith:X36WF5F4

pith:2016:X36WF5F44GP6YE6WOZQBONTB7K

not attested not anchored not stored refs pending

Automatic quality evaluation and (semi-) automatic improvement of OCR models for historical printings

F. Fink, K. U. Schulz, U. Springmann

arxiv:1606.05157 v2 · 2016-06-16 · cs.DL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{X36WF5F44GP6YE6WOZQBONTB7K}

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	2026-05-18T01:01:44.429250Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

befd62f4bce19fec13d67660173661fa80c92a7ddf5aeb7c71a5c530c643d387

Aliases

arxiv: 1606.05157 · arxiv_version: 1606.05157v2 · doi: 10.48550/arxiv.1606.05157 · pith_short_12: X36WF5F44GP6 · pith_short_16: X36WF5F44GP6YE6W · pith_short_8: X36WF5F4

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/X36WF5F44GP6YE6WOZQBONTB7K \
  | 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: befd62f4bce19fec13d67660173661fa80c92a7ddf5aeb7c71a5c530c643d387

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "900a8e522f42c21aad10587e4bcf04a6d14626db8f5406842f7289ff810f23d8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DL",
    "submitted_at": "2016-06-16T12:15:14Z",
    "title_canon_sha256": "c3abcbf5d679265fc66e2272aa3664bba6086b12b10cf4c5e65a7837727c33e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.05157",
    "kind": "arxiv",
    "version": 2
  }
}