Pith Number

pith:RIC6MCP6

pith:2019:RIC6MCP6KUTHQ6IFHE5K2LMTRL

not attested not anchored not stored refs pending

Christian Horrebow's Sunspot Observations -- II. Construction of a Record of Sunspot Positions

Carsten S{\o}nderskov J{\o}rgensen, Christoffer Karoff, Rainer Arlt, V. Senthamizh Pavai

arxiv:1906.10895 v1 · 2019-06-26 · 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{RIC6MCP6KUTHQ6IFHE5K2LMTRL}

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	2026-05-17T23:42:12.904851Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8a05e609fe5526787905393aad2d938ad0c67c69b81303b0046abc89ca51be98

Aliases

arxiv: 1906.10895 · arxiv_version: 1906.10895v1 · doi: 10.48550/arxiv.1906.10895 · pith_short_12: RIC6MCP6KUTH · pith_short_16: RIC6MCP6KUTHQ6IF · pith_short_8: RIC6MCP6

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/RIC6MCP6KUTHQ6IFHE5K2LMTRL \
  | 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: 8a05e609fe5526787905393aad2d938ad0c67c69b81303b0046abc89ca51be98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b42baf3a13ee25cc0c4c023c62667f30eda06c55bf66461502b94ef23942f88",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-06-26T07:54:45Z",
    "title_canon_sha256": "6247d94851210f2e6e09057296bf928ea48532d8997f210bb0007cb6c5dbf4bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.10895",
    "kind": "arxiv",
    "version": 1
  }
}