Pith Number

pith:4WOBGEGR

pith:2015:4WOBGEGR7EG4ZGVJCWADOC3JLU

not attested not anchored not stored refs pending

Records of sunspot and aurora during CE 960-1279 in the Chinese chronicle of the Song dynasty

Akito D Kawamura, Harufumi Tamazawa, Hiroaki Isobe, Hisashi Hayakawa

arxiv:1506.03715 v1 · 2015-06-11 · astro-ph.SR · physics.hist-ph · physics.space-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4WOBGEGR7EG4ZGVJCWADOC3JLU}

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	2026-05-18T01:37:48.758847Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e59c1310d1f90dcc9aa91580370b695d39d303a23cbb5c05a027dacfaca3b8fb

Aliases

arxiv: 1506.03715 · arxiv_version: 1506.03715v1 · doi: 10.48550/arxiv.1506.03715 · pith_short_12: 4WOBGEGR7EG4 · pith_short_16: 4WOBGEGR7EG4ZGVJ · pith_short_8: 4WOBGEGR

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/4WOBGEGR7EG4ZGVJCWADOC3JLU \
  | 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: e59c1310d1f90dcc9aa91580370b695d39d303a23cbb5c05a027dacfaca3b8fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9db0b60b71ef7719828fce01663f32550834fb2df9439e1ef9eb38e40f0c88d8",
    "cross_cats_sorted": [
      "physics.hist-ph",
      "physics.space-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-06-11T15:43:16Z",
    "title_canon_sha256": "f7d286b019aeab56f30399a23f11b0a776d3ea876714b6324a6653b9510a966f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.03715",
    "kind": "arxiv",
    "version": 1
  }
}