Pith Number

pith:DOP2I4RN

pith:2025:DOP2I4RNH3TGITI2SOWCBJAUUX

not attested not anchored not stored refs pending

The Great Observatories: A Triumph of the Human Spirit

Michael Werner

arxiv:2507.09735 v2 · 2025-07-13 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DOP2I4RNH3TGITI2SOWCBJAUUX}

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	2026-07-05T11:51:32.014960Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b9fa4722d3ee6644d1a93ac20a414a5deb3d4ee90f71955a7d3b5c19e0c517c

Aliases

arxiv: 2507.09735 · arxiv_version: 2507.09735v2 · doi: 10.48550/arxiv.2507.09735 · pith_short_12: DOP2I4RNH3TG · pith_short_16: DOP2I4RNH3TGITI2 · pith_short_8: DOP2I4RN

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/DOP2I4RNH3TGITI2SOWCBJAUUX \
  | 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: 1b9fa4722d3ee6644d1a93ac20a414a5deb3d4ee90f71955a7d3b5c19e0c517c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "751ef1cbb17407f134e75f1adfacaf333f48f209fa45cea281af161885145a90",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2025-07-13T18:21:42Z",
    "title_canon_sha256": "df74bac392bb7cfeda1d4034958360ed955c38bb0a1e711d3f47b25415db37cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.09735",
    "kind": "arxiv",
    "version": 2
  }
}