Pith Number

pith:KMZEXYP6

pith:2016:KMZEXYP6D5KTLHC6GEIE7QIR4M

not attested not anchored not stored refs pending

3-cm Fine Structure Masers: A Unique Signature of Supermassive Black Hole Formation via Direct Collapse in the Early Universe

Abraham Loeb (Harvard), Mark Dijkstra (ITA Oslo), Shiv Sethi (RRI)

arxiv:1601.04712 v1 · 2016-01-18 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KMZEXYP6D5KTLHC6GEIE7QIR4M}

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	2026-05-18T01:18:29.450044Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53324be1fe1f55359c5e31104fc111e326f7a2826375e5ed6f9f8e8a3dcab44a

Aliases

arxiv: 1601.04712 · arxiv_version: 1601.04712v1 · doi: 10.48550/arxiv.1601.04712 · pith_short_12: KMZEXYP6D5KT · pith_short_16: KMZEXYP6D5KTLHC6 · pith_short_8: KMZEXYP6

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/KMZEXYP6D5KTLHC6GEIE7QIR4M \
  | 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: 53324be1fe1f55359c5e31104fc111e326f7a2826375e5ed6f9f8e8a3dcab44a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fa83a9c8f5f282ebfb268dee332d9afd9f567fbda7941ba6e6ec808216d1384a",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-01-18T21:00:08Z",
    "title_canon_sha256": "e75ae8fc591b4c4b327eba60bfd936495eb02ef856fe5d7f7872b571628e2628"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.04712",
    "kind": "arxiv",
    "version": 1
  }
}