Pith Number

pith:O4S2FC3B

pith:2017:O4S2FC3BYNXPQIZOE67WTCXX4G

not attested not anchored not stored refs pending

Difficulties of Timestamping Archived Web Pages

Michael L. Nelson, Michele C. Weigle, Mohamed Aturban

arxiv:1712.03140 v1 · 2017-12-08 · 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{O4S2FC3BYNXPQIZOE67WTCXX4G}

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	2026-05-18T00:28:28.213311Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7725a28b61c36ef8232e27bf698af7e1855f2d133da41ceb7dab56d83701011a

Aliases

arxiv: 1712.03140 · arxiv_version: 1712.03140v1 · doi: 10.48550/arxiv.1712.03140 · pith_short_12: O4S2FC3BYNXP · pith_short_16: O4S2FC3BYNXPQIZO · pith_short_8: O4S2FC3B

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/O4S2FC3BYNXPQIZOE67WTCXX4G \
  | 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: 7725a28b61c36ef8232e27bf698af7e1855f2d133da41ceb7dab56d83701011a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c459449447e8604b495de61714488acc4d82411d43c00a4642200e580bd4323",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.DL",
    "submitted_at": "2017-12-08T15:59:32Z",
    "title_canon_sha256": "4322a26312687228f7c3e2871d48255474e5854d9815690ca7bbafe4156effdf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.03140",
    "kind": "arxiv",
    "version": 1
  }
}