Pith Number

pith:UMC6ZEQH

pith:2025:UMC6ZEQHRWYB6N2RH475GKX6ZE

not attested not anchored not stored refs pending

Earths composition: origin, evolution and energy budget

William F McDonough

arxiv:2505.02641 v2 · 2025-05-05 · physics.geo-ph · 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{UMC6ZEQHRWYB6N2RH475GKX6ZE}

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.

Cited by

1 paper in Pith

The Barnard's Star Planetary System: Stability, Composition, and Evolution of Four Sub-Earth Exoplanets

Receipt and verification

First computed	2026-07-05T10:59:10.472667Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a305ec92078db01f37513f3fd32afec928535a7712527883911f32fde71a948b

Aliases

arxiv: 2505.02641 · arxiv_version: 2505.02641v2 · doi: 10.48550/arxiv.2505.02641 · pith_short_12: UMC6ZEQHRWYB · pith_short_16: UMC6ZEQHRWYB6N2R · pith_short_8: UMC6ZEQH

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/UMC6ZEQHRWYB6N2RH475GKX6ZE \
  | 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: a305ec92078db01f37513f3fd32afec928535a7712527883911f32fde71a948b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c4210af25654a09c7d8fe27d32abafbc352bed8c08f1b5e16eea14dcd2c6905",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "physics.geo-ph",
    "submitted_at": "2025-05-05T13:36:50Z",
    "title_canon_sha256": "ad94243ae601410a706b58b85909ee8bab72b9dce055f667e3afcd5ee21b4201"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.02641",
    "kind": "arxiv",
    "version": 2
  }
}