Pith Number

pith:AHBUFKXD

pith:2014:AHBUFKXDNY4VIHJQRECLRQTM6Y

not attested not anchored not stored refs pending

Some inconvenient truths about biosignatures involving two chemical species on Earth-like exoplanets

David S. Spiegel, Hanno Rein, Yuka Fujii

arxiv:1404.6531 v1 · 2014-04-25 · astro-ph.EP · astro-ph.IM · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AHBUFKXDNY4VIHJQRECLRQTM6Y}

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	2026-05-18T02:43:02.270730Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

01c342aae36e39541d308904b8c26cf632331fbeca1a773b77c7519a4669a8fa

Aliases

arxiv: 1404.6531 · arxiv_version: 1404.6531v1 · doi: 10.48550/arxiv.1404.6531 · pith_short_12: AHBUFKXDNY4V · pith_short_16: AHBUFKXDNY4VIHJQ · pith_short_8: AHBUFKXD

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/AHBUFKXDNY4VIHJQRECLRQTM6Y \
  | 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: 01c342aae36e39541d308904b8c26cf632331fbeca1a773b77c7519a4669a8fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "919ca6fc3bd73792a7c2993a773f4bbcbb36136ca2899f0fe42057205b91c8a3",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2014-04-25T20:00:18Z",
    "title_canon_sha256": "855e0f033ff53d5d40c0ef95aab6fc122d8ee6d512898b3b7d3af6c68bb40503"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.6531",
    "kind": "arxiv",
    "version": 1
  }
}