Pith Number

pith:OVCRJUNO

pith:2018:OVCRJUNOSANW5SPHA7GQZHPAP4

not attested not anchored not stored refs pending

The Observational Signatures of Supermassive Black Hole Seeds

Angelo Ricarte, Priyamvada Natarajan

arxiv:1809.01177 v1 · 2018-09-04 · 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{OVCRJUNOSANW5SPHA7GQZHPAP4}

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	2026-05-18T00:05:27.798651Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

754514d1ae901b6ec9e707cd0c9de07f3b2a53b21277386a4861d19f987d6852

Aliases

arxiv: 1809.01177 · arxiv_version: 1809.01177v1 · doi: 10.48550/arxiv.1809.01177 · pith_short_12: OVCRJUNOSANW · pith_short_16: OVCRJUNOSANW5SPH · pith_short_8: OVCRJUNO

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/OVCRJUNOSANW5SPHA7GQZHPAP4 \
  | 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: 754514d1ae901b6ec9e707cd0c9de07f3b2a53b21277386a4861d19f987d6852

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00efc5017b9b16880828db09c72992917b779ddb4df03eb51ae3c74be4779227",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-09-04T18:09:00Z",
    "title_canon_sha256": "c9378786a36256345903b3cb3dc2f99f16e0855a00f6bea582a5b918ba69a19f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.01177",
    "kind": "arxiv",
    "version": 1
  }
}