Pith Number

pith:4EZAP4V6

pith:2025:4EZAP4V6D666B2NQ7OY6PGX5XO

not attested not anchored not stored refs pending

Detecting Extraterrestrial Civilizations That Employ an Earth-level Deep Space Network

Jason T. Wright, Pinchen Fan, T. Joseph W. Lazio

arxiv:2508.15425 v1 · 2025-08-21 · astro-ph.IM · astro-ph.EP · 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{4EZAP4V6D666B2NQ7OY6PGX5XO}

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	2026-07-05T11:57:12.180031Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e13207f2be1fbde0e9b0fbb1e79afdbb88d28565ce6e5d59193c0a21d8cb0181

Aliases

arxiv: 2508.15425 · arxiv_version: 2508.15425v1 · doi: 10.48550/arxiv.2508.15425 · pith_short_12: 4EZAP4V6D666 · pith_short_16: 4EZAP4V6D666B2NQ · pith_short_8: 4EZAP4V6

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/4EZAP4V6D666B2NQ7OY6PGX5XO \
  | 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: e13207f2be1fbde0e9b0fbb1e79afdbb88d28565ce6e5d59193c0a21d8cb0181

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc5445e49287f5f506f675fa025bd3b69a1ce1eec92d304462decfef211e143c",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "physics.pop-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2025-08-21T10:26:19Z",
    "title_canon_sha256": "a69fa62b1fa1bd95be46f427139ce42cc7fd7db5642fb48a5c14424f4f466a3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.15425",
    "kind": "arxiv",
    "version": 1
  }
}