Pith Number

pith:FDJKD4BP

pith:2018:FDJKD4BP3Q6W6KYLBUD5B7G7OR

not attested not anchored not stored refs pending

Galactic Panspermia

Abraham Loeb, Idan Ginsburg, Manasvi Lingam

arxiv:1810.04307 v2 · 2018-10-10 · astro-ph.EP · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FDJKD4BP3Q6W6KYLBUD5B7G7OR}

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	2026-05-18T00:00:29.543824Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28d2a1f02fdc3d6f2b0b0d07d0fcdf7450767eb837c056c0acfabc93dac3fbca

Aliases

arxiv: 1810.04307 · arxiv_version: 1810.04307v2 · doi: 10.48550/arxiv.1810.04307 · pith_short_12: FDJKD4BP3Q6W · pith_short_16: FDJKD4BP3Q6W6KYL · pith_short_8: FDJKD4BP

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/FDJKD4BP3Q6W6KYLBUD5B7G7OR \
  | 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: 28d2a1f02fdc3d6f2b0b0d07d0fcdf7450767eb837c056c0acfabc93dac3fbca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f03dc434cd4da0d81e67d9c02ba8ad078793795e21c07469b28e8cc1780ab34",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-10-10T00:32:42Z",
    "title_canon_sha256": "d3e8f9e3e4a78c4d21b6a45a476538b7f13dc6ca0512d9d583e2c146daf6625c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.04307",
    "kind": "arxiv",
    "version": 2
  }
}