Pith Number

pith:7QR2PDGG

pith:2019:7QR2PDGGHWYWQ5F4CLRIJG2GMY

not attested not anchored not stored refs pending

Intelligent Recognition of Time Stamp Characters in Solar Scanned Images from Film

GangHua Lin, GuangZhong Lin, Haimin Wang, JiaFeng Zhang, Sheng Zheng, ShuGuang Zeng, Xiangyun Zeng, Xiao Yang

arxiv:1909.00316 v1 · 2019-09-01 · astro-ph.SR · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7QR2PDGGHWYWQ5F4CLRIJG2GMY}

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	2026-07-05T00:01:07.806906Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc23a78cc63db16874bc12e2849b46660cc50e5daad21e5d3e29e7653444d016

Aliases

arxiv: 1909.00316 · arxiv_version: 1909.00316v1 · doi: 10.48550/arxiv.1909.00316 · pith_short_12: 7QR2PDGGHWYW · pith_short_16: 7QR2PDGGHWYWQ5F4 · pith_short_8: 7QR2PDGG

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/7QR2PDGGHWYWQ5F4CLRIJG2GMY \
  | 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: fc23a78cc63db16874bc12e2849b46660cc50e5daad21e5d3e29e7653444d016

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fca18e492a5f43f552b3e160c85e76643a18caba33594431f551c6675b392a55",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-09-01T03:34:11Z",
    "title_canon_sha256": "c10c261c214c49e85eba2a46e52d5b505ffcb119c7a6f26f72b605bf285f16f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.00316",
    "kind": "arxiv",
    "version": 1
  }
}