Pith Number

pith:EDY5D2JF

pith:2015:EDY5D2JFXMEYSI3XP5C3W46B7S

not attested not anchored not stored refs pending

SETI at Planck Energy: When Particle Physicists Become Cosmic Engineers

Brian C. Lacki

arxiv:1503.01509 v1 · 2015-03-05 · astro-ph.HE · hep-ph · physics.pop-ph

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

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.

Cited by

2 papers in Pith

Redshifted civilizations, galactic empires, and the Fermi paradox

The Dyson Minds 2025 Workshop: SETI around Black Holes

Receipt and verification

First computed	2026-05-18T02:25:33.484859Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20f1d1e925bb098923777f45bb73c1fcb3c8686a82ac0f9cb3dc7700fe814076

Aliases

arxiv: 1503.01509 · arxiv_version: 1503.01509v1 · doi: 10.48550/arxiv.1503.01509 · pith_short_12: EDY5D2JFXMEY · pith_short_16: EDY5D2JFXMEYSI3X · pith_short_8: EDY5D2JF

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/EDY5D2JFXMEYSI3XP5C3W46B7S \
  | 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: 20f1d1e925bb098923777f45bb73c1fcb3c8686a82ac0f9cb3dc7700fe814076

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a762e1939e739428de512f3308a08600d2f30550e54c060bec78482bfdd68c7",
    "cross_cats_sorted": [
      "hep-ph",
      "physics.pop-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2015-03-05T01:59:53Z",
    "title_canon_sha256": "0b48500e8b58ca9592959cff39be7e42154521a4ec4782eda1d66c31fee40325"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.01509",
    "kind": "arxiv",
    "version": 1
  }
}