Pith Number

pith:OB7ACKSZ

pith:2012:OB7ACKSZYBG72QBCQFY5PW54UE

not attested not anchored not stored refs pending

Black Holes in the Early Universe

Jillian Bellovary, Marta Volonteri

arxiv:1209.2243 v1 · 2012-09-11 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OB7ACKSZYBG72QBCQFY5PW54UE}

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	2026-05-18T01:54:30.696371Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

707e012a59c04dfd40228171d7dbbca139519dcb7e70f8d4670b999491e909bf

Aliases

arxiv: 1209.2243 · arxiv_version: 1209.2243v1 · doi: 10.48550/arxiv.1209.2243 · pith_short_12: OB7ACKSZYBG7 · pith_short_16: OB7ACKSZYBG72QBC · pith_short_8: OB7ACKSZ

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/OB7ACKSZYBG72QBCQFY5PW54UE \
  | 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: 707e012a59c04dfd40228171d7dbbca139519dcb7e70f8d4670b999491e909bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa54ef63e9632802c095d85a12db00fd625d877033bfb4a120fe39a163e2dba4",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-09-11T07:09:13Z",
    "title_canon_sha256": "4863bdb4cef2ec5be8274084ecf388991b73f85ec461db7a14673cd4a0d760b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.2243",
    "kind": "arxiv",
    "version": 1
  }
}