Pith Number

pith:T2RKMQG6

pith:2016:T2RKMQG6EZGIY2YJ2ZHS4HXQC3

not attested not anchored not stored refs pending

An Assessment of Sunspot Number Data Composites over 1845-2014

Ilya G. Usoskin, Luke A. Barnard, Mathew J. Owens, Mike Lockwood

arxiv:1604.04538 v1 · 2016-04-15 · 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{T2RKMQG6EZGIY2YJ2ZHS4HXQC3}

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	2026-05-18T01:12:11.802219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ea2a640de264c8c6b09d64f2e1ef016efdffcead221e829f8fc190f5c62ac2d

Aliases

arxiv: 1604.04538 · arxiv_version: 1604.04538v1 · doi: 10.48550/arxiv.1604.04538 · pith_short_12: T2RKMQG6EZGI · pith_short_16: T2RKMQG6EZGIY2YJ · pith_short_8: T2RKMQG6

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/T2RKMQG6EZGIY2YJ2ZHS4HXQC3 \
  | 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: 9ea2a640de264c8c6b09d64f2e1ef016efdffcead221e829f8fc190f5c62ac2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a68c397c3b2b04e19fa61090981634ffbd995ad07aedf5e3643de5f3e6cc902",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-04-15T15:26:35Z",
    "title_canon_sha256": "6e976488ab40317962eb79761019abe20383bc1f63dee30f0f0dc82d2c6f4d2d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.04538",
    "kind": "arxiv",
    "version": 1
  }
}