Pith Number

pith:CDCXGZIP

pith:2011:CDCXGZIPSDRUZDJNL5GBPOXFXC

not attested not anchored not stored refs pending

A brief history of the search for extraterrestrial intelligence and an appraisal of the future of this endeavor

Berkeley), Stuart Bowyer (Space Sciences Laboratory, University of California

arxiv:1108.3374 v2 · 2011-08-17 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CDCXGZIPSDRUZDJNL5GBPOXFXC}

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	2026-05-18T02:00:53.026196Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10c573650f90e34c8d2d5f4c17bae5b8a2999a143ab36f2186348f3fb2c4c201

Aliases

arxiv: 1108.3374 · arxiv_version: 1108.3374v2 · doi: 10.48550/arxiv.1108.3374 · pith_short_12: CDCXGZIPSDRU · pith_short_16: CDCXGZIPSDRUZDJN · pith_short_8: CDCXGZIP

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/CDCXGZIPSDRUZDJNL5GBPOXFXC \
  | 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: 10c573650f90e34c8d2d5f4c17bae5b8a2999a143ab36f2186348f3fb2c4c201

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "239a7a9eb2dffc543c46d4acacf181b651d509d12de2b2137381287545712196",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2011-08-17T01:33:58Z",
    "title_canon_sha256": "184429aff688d695bf06fe6a4e12f1a3bc26c21d9a22e1a8e6093f9e95940fdb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.3374",
    "kind": "arxiv",
    "version": 2
  }
}