Pith Number

pith:464O2FCM

pith:2019:464O2FCMZUZARD5EQSDFCTKJQF

not attested not anchored not stored refs pending

Nitrogen Oxide Concentrations in Natural Waters on Early Earth

Andrew R. Babbin, Dimitar D. Sasselov, Paul B. Rimmer, Sukrit Ranjan, Zoe R. Todd

arxiv:1902.07740 v1 · 2019-02-20 · 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{464O2FCMZUZARD5EQSDFCTKJQF}

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	2026-05-17T23:44:12.030350Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e7b8ed144ccd32088fa48486514d4981568c379f63bdc8e7d42eac8c52fd6b40

Aliases

arxiv: 1902.07740 · arxiv_version: 1902.07740v1 · doi: 10.48550/arxiv.1902.07740 · pith_short_12: 464O2FCMZUZA · pith_short_16: 464O2FCMZUZARD5E · pith_short_8: 464O2FCM

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/464O2FCMZUZARD5EQSDFCTKJQF \
  | 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: e7b8ed144ccd32088fa48486514d4981568c379f63bdc8e7d42eac8c52fd6b40

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d7431c2b6c95c687b26d00dbe5f3ec8d7e895254241d569d4e66e66b6f4e93a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-02-20T19:20:22Z",
    "title_canon_sha256": "af8d1f4505b5594a94d35a0ed5f5d2a5a3d1bca32a00ae846774c21f4fd99c3b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.07740",
    "kind": "arxiv",
    "version": 1
  }
}