Pith Number

pith:7SG5WPSF

pith:2012:7SG5WPSFUQAOJC3PRIKG5YTRDX

not attested not anchored not stored refs pending

AAO Observer Number 121 (February 2012)

Andy Green

arxiv:1204.2874 v1 · 2012-04-13 · astro-ph.IM · astro-ph.CO · 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{7SG5WPSFUQAOJC3PRIKG5YTRDX}

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	2026-05-18T03:58:02.645063Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc8ddb3e45a400e48b6f8a146ee2711dc253baca3db89d26255aca7ec8e844a9

Aliases

arxiv: 1204.2874 · arxiv_version: 1204.2874v1 · doi: 10.48550/arxiv.1204.2874 · pith_short_12: 7SG5WPSFUQAO · pith_short_16: 7SG5WPSFUQAOJC3P · pith_short_8: 7SG5WPSF

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/7SG5WPSFUQAOJC3PRIKG5YTRDX \
  | 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: fc8ddb3e45a400e48b6f8a146ee2711dc253baca3db89d26255aca7ec8e844a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bde0e9a1e379db1fed11fec5b1666e8d155ad094d13a8b8164e89861a51c2f4e",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-04-13T03:48:42Z",
    "title_canon_sha256": "29ef559d78f873e2c5e2a5a6c4fd0d7e823a12a13c10576acd44688ec6e54a2a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2874",
    "kind": "arxiv",
    "version": 1
  }
}