Pith Number

pith:FUMZ5U2H

pith:2018:FUMZ5U2H4VDEMPT2DP3DWBRYJ6

not attested not anchored not stored refs pending

Ground Truth for training OCR engines on historical documents in German Fraktur and Early Modern Latin

Christian Reul, Johannes Baiter, Stefanie Dipper, Uwe Springmann

arxiv:1809.05501 v1 · 2018-09-14 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FUMZ5U2H4VDEMPT2DP3DWBRYJ6}

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	2026-05-18T00:05:41.262833Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d199ed347e546463e7a1bf63b06384f86eb7eed634c0ad1ad7e7c1fba95fc3c

Aliases

arxiv: 1809.05501 · arxiv_version: 1809.05501v1 · doi: 10.48550/arxiv.1809.05501 · pith_short_12: FUMZ5U2H4VDE · pith_short_16: FUMZ5U2H4VDEMPT2 · pith_short_8: FUMZ5U2H

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/FUMZ5U2H4VDEMPT2DP3DWBRYJ6 \
  | 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: 2d199ed347e546463e7a1bf63b06384f86eb7eed634c0ad1ad7e7c1fba95fc3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c522702f557cc8f5d120b31295a9ce4fbd0fe37c8fb5e731a5b9185f011b309",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2018-09-14T16:52:12Z",
    "title_canon_sha256": "e5d5983efa24f68e5f642d6a00c5c07d2c472d0e7537894fe5a1adf7c835ae45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.05501",
    "kind": "arxiv",
    "version": 1
  }
}