Pith Number

pith:AYAK3A4L

pith:2022:AYAK3A4LUMD5UUPRSZC4JBBV4T

not attested not anchored not stored refs pending

Classification of Astrophysics Journal Articles with Machine Learning to Identify Data for NED

Ben H. P. Chan, Cren Frayer, David Cook, Joseph M. Mazzarella, Marion Schmitz, Rick Ebert, Scott Terek, Tak Lo, Tracy X. Chen, Xiuqin Wu

arxiv:2201.03636 v1 · 2022-01-10 · 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{AYAK3A4LUMD5UUPRSZC4JBBV4T}

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	2026-07-05T03:48:31.564974Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0600ad838ba307da51f19645c48435e4dd224b1c4cb19afd20fb2370f442cfe6

Aliases

arxiv: 2201.03636 · arxiv_version: 2201.03636v1 · doi: 10.48550/arxiv.2201.03636 · pith_short_12: AYAK3A4LUMD5 · pith_short_16: AYAK3A4LUMD5UUPR · pith_short_8: AYAK3A4L

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/AYAK3A4LUMD5UUPRSZC4JBBV4T \
  | 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: 0600ad838ba307da51f19645c48435e4dd224b1c4cb19afd20fb2370f442cfe6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9f4e0989e4078755c6a0ffb798747bf1f30071065d8b746c0e8e53b8c5633bc0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2022-01-10T20:37:14Z",
    "title_canon_sha256": "f482cde1274074fe620e7504b7e9207a3efe0e07e000984fb51466bc22db2df3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2201.03636",
    "kind": "arxiv",
    "version": 1
  }
}