Pith Number

pith:6PFCXVRT

pith:2018:6PFCXVRTGDBQAWZZLEVCKDMSEV

not attested not anchored not stored refs pending

Focused Crawl of Web Archives to Build Event Collections

Herbert Van de Sompel, Lyudmila Balakireva, Martin Klein

arxiv:1804.01603 v1 · 2018-04-04 · 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{6PFCXVRTGDBQAWZZLEVCKDMSEV}

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	2026-05-18T00:19:10.743529Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3ca2bd63330c3005b39592a250d9225697c737fcd07b03ced5b48efc06cc9e7

Aliases

arxiv: 1804.01603 · arxiv_version: 1804.01603v1 · doi: 10.48550/arxiv.1804.01603 · pith_short_12: 6PFCXVRTGDBQ · pith_short_16: 6PFCXVRTGDBQAWZZ · pith_short_8: 6PFCXVRT

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/6PFCXVRTGDBQAWZZLEVCKDMSEV \
  | 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: f3ca2bd63330c3005b39592a250d9225697c737fcd07b03ced5b48efc06cc9e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e950809d77100a7f87d79078bd1ff34bffd8f7848a2359026b9c04356447e4cb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DL",
    "submitted_at": "2018-04-04T20:40:47Z",
    "title_canon_sha256": "b76f5c45ab905b800568da2348fe8a147481b587a1f86ed8957ba8de844e4ce3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.01603",
    "kind": "arxiv",
    "version": 1
  }
}