Pith Number

pith:GCDBOBGR

pith:2026:GCDBOBGR2WMYTTY7TBTR5XFOPW

not attested not anchored not stored refs pending

Signatures of Black Hole Spin in Horizon-Scale Polarimetry

Andrew Chael, Daniel C. M. Palumbo, George N. Wong, Zachary Gelles

arxiv:2607.14218 v1 · 2026-07-15 · 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{GCDBOBGR2WMYTTY7TBTR5XFOPW}

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	2026-07-17T00:20:58.755361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

30861704d1d59989cf1f98671edcae7d8ff462691420dac79417a521c9484902

Aliases

arxiv: 2607.14218 · arxiv_version: 2607.14218v1 · doi: 10.48550/arxiv.2607.14218 · pith_short_12: GCDBOBGR2WMY · pith_short_16: GCDBOBGR2WMYTTY7 · pith_short_8: GCDBOBGR

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/GCDBOBGR2WMYTTY7TBTR5XFOPW \
  | 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: 30861704d1d59989cf1f98671edcae7d8ff462691420dac79417a521c9484902

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19e0ad4d61538355e3be432765024a046f77467498d2a04eeb41d8495c835568",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-07-15T18:00:26Z",
    "title_canon_sha256": "056dfab83b4881295c26627184da003a43a6d4aea2715de1a02444deccd19e53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.14218",
    "kind": "arxiv",
    "version": 1
  }
}