Pith Number

pith:VG57OFDQ

pith:2016:VG57OFDQVLONOEI7OWIAHEISWZ

not attested not anchored not stored refs pending

Tests of Sunspot Number Sequences: 1. Using Ionosonde Data

C.J. Scott, D.M. Willis, L. Barnard, M.J. Owens, M. Lockwood

arxiv:1601.06441 v1 · 2016-01-24 · 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{VG57OFDQVLONOEI7OWIAHEISWZ}

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	2026-05-18T01:18:38.060574Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9bbf71470aadcd7111f7590039112b6481b9578aada92a847e4fb2c121b04cd

Aliases

arxiv: 1601.06441 · arxiv_version: 1601.06441v1 · doi: 10.48550/arxiv.1601.06441 · pith_short_12: VG57OFDQVLON · pith_short_16: VG57OFDQVLONOEI7 · pith_short_8: VG57OFDQ

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/VG57OFDQVLONOEI7OWIAHEISWZ \
  | 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: a9bbf71470aadcd7111f7590039112b6481b9578aada92a847e4fb2c121b04cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8268a149f6def09e1a6303d70e61d471ce779ac0ef0d873cafb4cfaded638a0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-01-24T22:48:09Z",
    "title_canon_sha256": "379561cac24aa154dee6fed79bb8f11df7f8860c6a3fb33f93bcd423990ac80b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.06441",
    "kind": "arxiv",
    "version": 1
  }
}