Pith Number

pith:TRW2LPAO

pith:2014:TRW2LPAOPEXDGZPK3SRQXD5IKK

not attested not anchored not stored refs pending

A comet could not produce the carbon-14 spike in the 8th century

Gennady Kovaltsov, Ilya Usoskin

arxiv:1401.5945 v2 · 2014-01-23 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TRW2LPAOPEXDGZPK3SRQXD5IKK}

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	2026-05-18T00:33:44.410713Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c6da5bc0e792e3365eadca30b8fa852b2457529210e55a5b02e704ea5f4251d

Aliases

arxiv: 1401.5945 · arxiv_version: 1401.5945v2 · doi: 10.48550/arxiv.1401.5945 · pith_short_12: TRW2LPAOPEXD · pith_short_16: TRW2LPAOPEXDGZPK · pith_short_8: TRW2LPAO

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/TRW2LPAOPEXDGZPK3SRQXD5IKK \
  | 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: 9c6da5bc0e792e3365eadca30b8fa852b2457529210e55a5b02e704ea5f4251d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "393a00d0bf42d79318d2b9ee6b733da400631cdf6b21a164bf1d49f74b435dd9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2014-01-23T11:51:51Z",
    "title_canon_sha256": "8b79d85d9dd889bbb5b7e50463a68c317d167c5c22c36177efa453a5d1bc3281"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.5945",
    "kind": "arxiv",
    "version": 2
  }
}