Pith Number

pith:YDA7F4OI

pith:2009:YDA7F4OISPDTJ2RR3FSKENTUQM

not attested not anchored not stored refs pending

Testing SETI Message Designs

Michael W. Busch, Rachel M. Reddick

arxiv:0911.3976 v3 · 2009-11-20 · astro-ph.IM · physics.pop-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YDA7F4OISPDTJ2RR3FSKENTUQM}

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	2026-05-18T04:31:22.633251Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c0c1f2f1c893c734ea31d964a2367483310c91a693334aa6856c76ed2955749d

Aliases

arxiv: 0911.3976 · arxiv_version: 0911.3976v3 · doi: 10.48550/arxiv.0911.3976 · pith_short_12: YDA7F4OISPDT · pith_short_16: YDA7F4OISPDTJ2RR · pith_short_8: YDA7F4OI

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/YDA7F4OISPDTJ2RR3FSKENTUQM \
  | 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: c0c1f2f1c893c734ea31d964a2367483310c91a693334aa6856c76ed2955749d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c5777aff1ada723e771e6601c42dc633892098024b879210930d6564916afea",
    "cross_cats_sorted": [
      "physics.pop-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-11-20T06:56:36Z",
    "title_canon_sha256": "641451139922091213168ed3c15f8c8abfcd2f5958986fd881b4ac661e2ddb11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.3976",
    "kind": "arxiv",
    "version": 3
  }
}