Pith Number

pith:ESM7XP4Y

pith:2015:ESM7XP4YJEAL6TUQAJLCFTFWAG

not attested not anchored not stored refs pending

Tests of sunspot number sequences: 3. Effects of regression procedures on the calibration of historic sunspot data

I.G. Usoskin, L. Barnard, M.J Owens, M. Lockwood

arxiv:1510.07809 v3 · 2015-10-27 · 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{ESM7XP4YJEAL6TUQAJLCFTFWAG}

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	2026-05-18T01:18:42.118634Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2499fbbf984900bf4e90025622ccb60199f5d2b67fb3778270476d10d5f862a9

Aliases

arxiv: 1510.07809 · arxiv_version: 1510.07809v3 · doi: 10.48550/arxiv.1510.07809 · pith_short_12: ESM7XP4YJEAL · pith_short_16: ESM7XP4YJEAL6TUQ · pith_short_8: ESM7XP4Y

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/ESM7XP4YJEAL6TUQAJLCFTFWAG \
  | 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: 2499fbbf984900bf4e90025622ccb60199f5d2b67fb3778270476d10d5f862a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e3aedc015351ccb70b54b01e9ed480ceee3aa0962a094df75cc89650136f7e1a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-10-27T08:28:22Z",
    "title_canon_sha256": "ae665e5606ad9c60d8f0eb572531a05839bc94f842d640bf28195bc09353c646"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.07809",
    "kind": "arxiv",
    "version": 3
  }
}