Pith Number

pith:XRCW4BNF

pith:2018:XRCW4BNFE3GCJ5RCN4NDFVCW4Q

not attested not anchored not stored refs pending

Dynamical and biological panspermia constraints within multi-planet exosystems

Alan P. Jackson, David J. Armstrong, Dimitri Veras, Hendrik Schaefer, James A. Blake, Jose F. Gutierrez-Marcos

arxiv:1802.04279 v2 · 2018-02-12 · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XRCW4BNFE3GCJ5RCN4NDFVCW4Q}

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	2026-05-18T00:01:09.813146Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc456e05a526cc24f6226f1a32d456e43f5a72b0abb01caa422a5aba328a6f87

Aliases

arxiv: 1802.04279 · arxiv_version: 1802.04279v2 · doi: 10.48550/arxiv.1802.04279 · pith_short_12: XRCW4BNFE3GC · pith_short_16: XRCW4BNFE3GCJ5RC · pith_short_8: XRCW4BNF

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/XRCW4BNFE3GCJ5RCN4NDFVCW4Q \
  | 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: bc456e05a526cc24f6226f1a32d456e43f5a72b0abb01caa422a5aba328a6f87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c2a68d8f45873361c3ac85388938d2ecb342990e6a943cc93bfb411d49f6d02",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-02-12T19:00:03Z",
    "title_canon_sha256": "67e58fa5770f79f305143de628816c1ac638efb398ae4b0ba3eec8a8f8730e4c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.04279",
    "kind": "arxiv",
    "version": 2
  }
}