Pith Number

pith:UPVJ4QQK

pith:2012:UPVJ4QQKMBIWUG4MDWEBR4PMW2

not attested not anchored not stored refs pending

Digitization of Sp\"orer's sunspot drawings

Andrea Diercke, Carsten Denker, Rainer Arlt

arxiv:1210.5856 v1 · 2012-10-22 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UPVJ4QQKMBIWUG4MDWEBR4PMW2}

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	2026-05-18T01:53:45.101164Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3ea9e420a60516a1b8c1d8818f1ecb68e58c598400ab3f378f9fd88a49129fa

Aliases

arxiv: 1210.5856 · arxiv_version: 1210.5856v1 · doi: 10.48550/arxiv.1210.5856 · pith_short_12: UPVJ4QQKMBIW · pith_short_16: UPVJ4QQKMBIWUG4M · pith_short_8: UPVJ4QQK

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/UPVJ4QQKMBIWUG4MDWEBR4PMW2 \
  | 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: a3ea9e420a60516a1b8c1d8818f1ecb68e58c598400ab3f378f9fd88a49129fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6026601e6fbe0e6e1a32e47539099569137c6a231855ea8c329f9c648b9ff883",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-10-22T10:13:03Z",
    "title_canon_sha256": "b9ffcc015d5f75a2f2f3411a8aa018f06a154a0bac3ca75ca69bce47104040af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.5856",
    "kind": "arxiv",
    "version": 1
  }
}