Pith Number

pith:75ERKB22

pith:2018:75ERKB227S5DYEUFQLYCVII65C

not attested not anchored not stored refs pending

Surface and Temporal Biosignatures

Edward W. Schwieterman

arxiv:1803.05065 v2 · 2018-03-13 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{75ERKB227S5DYEUFQLYCVII65C}

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	2026-05-17T23:59:09.546581Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff4915075afcba3c128582f02aa11ee884a8aee9bf0c8d44e6a7647e3946d2d8

Aliases

arxiv: 1803.05065 · arxiv_version: 1803.05065v2 · doi: 10.48550/arxiv.1803.05065 · pith_short_12: 75ERKB227S5D · pith_short_16: 75ERKB227S5DYEUF · pith_short_8: 75ERKB22

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/75ERKB227S5DYEUFQLYCVII65C \
  | 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: ff4915075afcba3c128582f02aa11ee884a8aee9bf0c8d44e6a7647e3946d2d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7531d8e4e4b52da5620848ecb3db07503aa122e5982f530dad8da2842bd73f3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-03-13T22:15:56Z",
    "title_canon_sha256": "83ba00cedf64320a3a68094a79a54cdab22cf1fffedb03f6e1f07958aefd405e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.05065",
    "kind": "arxiv",
    "version": 2
  }
}