Pith Number

pith:KTND5SU2

pith:2017:KTND5SU2QXYMXAZ7XBHVFMFN6K

not attested not anchored not stored refs pending

Records of Sunspots and Aurora Candidates in the Chinese Official Histories of the Yu\'an and M\'ing Dynasties during 1261-1644

Akito Davis Kawamura, Harufumi Tamazawa, Hiroaki Isobe, Hiroko Miyahara, Hisashi Hayakawa, Tadanobu Aoyama, Yusuke Ebihara

arxiv:1705.02238 v1 · 2017-05-05 · 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{KTND5SU2QXYMXAZ7XBHVFMFN6K}

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	2026-05-18T00:36:14.031025Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54da3eca9a85f0cb833fb84f52b0adf29cdc72d9466cae80993ac8558c6d029a

Aliases

arxiv: 1705.02238 · arxiv_version: 1705.02238v1 · doi: 10.48550/arxiv.1705.02238 · pith_short_12: KTND5SU2QXYM · pith_short_16: KTND5SU2QXYMXAZ7 · pith_short_8: KTND5SU2

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/KTND5SU2QXYMXAZ7XBHVFMFN6K \
  | 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: 54da3eca9a85f0cb833fb84f52b0adf29cdc72d9466cae80993ac8558c6d029a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "154c6208ec3f9a64696b098a19d2acee6a6379feb9ab1a8b54895b5d306dbcc0",
    "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": "2017-05-05T14:30:15Z",
    "title_canon_sha256": "8b7c350cef5ccc3f001f0a35ca0c621a90047c17a9983a618e63c1e585702009"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.02238",
    "kind": "arxiv",
    "version": 1
  }
}