Pith Number

pith:QRJ7UVY7

pith:2020:QRJ7UVY7BUYSPW5AGE44WNCK5G

not attested not anchored not stored refs pending

Reverse engineering the Milky Way

Duncan A. Forbes

arxiv:2002.01512 v1 · 2020-02-04 · 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{QRJ7UVY7BUYSPW5AGE44WNCK5G}

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	2026-07-05T00:40:10.564414Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8453fa571f0d3127dba03139cb344ae997305e0ff1d294a0fb35edcd27623e77

Aliases

arxiv: 2002.01512 · arxiv_version: 2002.01512v1 · doi: 10.48550/arxiv.2002.01512 · pith_short_12: QRJ7UVY7BUYS · pith_short_16: QRJ7UVY7BUYSPW5A · pith_short_8: QRJ7UVY7

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/QRJ7UVY7BUYSPW5AGE44WNCK5G \
  | 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: 8453fa571f0d3127dba03139cb344ae997305e0ff1d294a0fb35edcd27623e77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9cda2a743dd176db4c9ef6fdc7c51da5d6f2432f49c2113b68d2fd398f45f0f6",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-02-04T19:31:26Z",
    "title_canon_sha256": "2913d65abe7cb33e5e08d57235ed1ca11a7555e5670a43980470f8e7be5c69de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.01512",
    "kind": "arxiv",
    "version": 1
  }
}