Pith Number

pith:OPDWZG2Y

pith:2019:OPDWZG2YMCGP6KVOKMYH6SR54A

not attested not anchored not stored refs pending

Comparison of Gaia DR2 Parallaxes of Stars with VLBI Astrometry

Bo Zhang, Guangli Wang, Mark J. Reid, Shuangjing Xu, Xingwu Zheng

arxiv:1903.04105 v2 · 2019-03-11 · astro-ph.SR · astro-ph.GA · 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{OPDWZG2YMCGP6KVOKMYH6SR54A}

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	2026-05-17T23:47:25.409008Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73c76c9b58608cff2aae53307f4a3de028a3ed9845f76652f33268a3feb77b77

Aliases

arxiv: 1903.04105 · arxiv_version: 1903.04105v2 · doi: 10.48550/arxiv.1903.04105 · pith_short_12: OPDWZG2YMCGP · pith_short_16: OPDWZG2YMCGP6KVO · pith_short_8: OPDWZG2Y

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/OPDWZG2YMCGP6KVOKMYH6SR54A \
  | 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: 73c76c9b58608cff2aae53307f4a3de028a3ed9845f76652f33268a3feb77b77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ccd17b65f97cc4dea543cb602cf5d2b0b9e27111c4b926bece28f7453b86e897",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-03-11T02:43:03Z",
    "title_canon_sha256": "f053229aacbbf672f1590d0ea89f8fc9042545f7b5eed3997920a4de79d846d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.04105",
    "kind": "arxiv",
    "version": 2
  }
}