Pith Number

pith:VD52JKB3

pith:2018:VD52JKB3E6544DN2E2MZYVA6LT

not attested not anchored not stored refs pending

Chasing the observational signatures of seed black holes at z > 7: candidate observability

Edwige Pezzulli, Luca Graziani, Luca Zappacosta, Marta Volonteri, Raffaella Schneider, Rosa Valiante

arxiv:1801.08165 v1 · 2018-01-24 · 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{VD52JKB3E6544DN2E2MZYVA6LT}

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	2026-05-18T00:00:08.825294Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8fba4a83b27bbce0dba26999c541e5cf92c2520a7c8139ede91a838c924e1a9

Aliases

arxiv: 1801.08165 · arxiv_version: 1801.08165v1 · doi: 10.48550/arxiv.1801.08165 · pith_short_12: VD52JKB3E654 · pith_short_16: VD52JKB3E6544DN2 · pith_short_8: VD52JKB3

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/VD52JKB3E6544DN2E2MZYVA6LT \
  | 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: a8fba4a83b27bbce0dba26999c541e5cf92c2520a7c8139ede91a838c924e1a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1065d142f1367c30b6cb6f35d8d426b8c496fd0fda8d3bfbabca78861bd26352",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-01-24T19:52:23Z",
    "title_canon_sha256": "06fa13caf539c67870a1c0fdcb5532938d0b2fe3c336b2d081ae98072f63f17e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.08165",
    "kind": "arxiv",
    "version": 1
  }
}