Pith Number

pith:IKZ4OKXJ

pith:2013:IKZ4OKXJMRCUDTHOPKUECAIFA4

not attested not anchored not stored refs pending

Cosmic Clocks

Donghui Jeong, Fabian Schmidt

arxiv:1305.1299 v1 · 2013-05-06 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IKZ4OKXJMRCUDTHOPKUECAIFA4}

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	2026-05-18T02:57:23.923842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42b3c72ae9644541ccee7aa8410105072f9dcf28790fa138beede9a8f0f3a184

Aliases

arxiv: 1305.1299 · arxiv_version: 1305.1299v1 · doi: 10.48550/arxiv.1305.1299 · pith_short_12: IKZ4OKXJMRCU · pith_short_16: IKZ4OKXJMRCUDTHO · pith_short_8: IKZ4OKXJ

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/IKZ4OKXJMRCUDTHOPKUECAIFA4 \
  | 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: 42b3c72ae9644541ccee7aa8410105072f9dcf28790fa138beede9a8f0f3a184

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f5863213c515ef53e2e2e0908a93e7fef0fda70ac6742014823dd29d6cecd47",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-05-06T20:00:01Z",
    "title_canon_sha256": "d05fe4fae259915da1da3b20452a63c7c982287ce371f2fba68af2c236a022c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.1299",
    "kind": "arxiv",
    "version": 1
  }
}