Pith Number

pith:GBPQ7TYN

pith:2025:GBPQ7TYNKB6KKM72O6RXGFJ2DA

not attested not anchored not stored refs pending

Fifty Years of CAK

Jorick S. Vink (Armagh Observatory, Planetarium)

arxiv:2506.06421 v1 · 2025-06-06 · astro-ph.SR · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GBPQ7TYNKB6KKM72O6RXGFJ2DA}

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	2026-07-05T11:17:50.014960Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

305f0fcf0d507ca533fa77a373153a181c029e14e50f471b50c30b9541074ea2

Aliases

arxiv: 2506.06421 · arxiv_version: 2506.06421v1 · doi: 10.48550/arxiv.2506.06421 · pith_short_12: GBPQ7TYNKB6K · pith_short_16: GBPQ7TYNKB6KKM72 · pith_short_8: GBPQ7TYN

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/GBPQ7TYNKB6KKM72O6RXGFJ2DA \
  | 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: 305f0fcf0d507ca533fa77a373153a181c029e14e50f471b50c30b9541074ea2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c1d7e27c4910ea6b41fc80d3e96f2f78d22a15868ad45026361f82b93eebe2c",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2025-06-06T18:00:01Z",
    "title_canon_sha256": "966b8b2e4b08c9096451a4956153a0494bbb71ddd5e126675a6829e528ea26e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.06421",
    "kind": "arxiv",
    "version": 1
  }
}