Pith Number

pith:4AKLZ2PD

pith:2018:4AKLZ2PDLB7QZLPZKL6NIDPXOD

not attested not anchored not stored refs pending

Iris Recognition After Death

Adam Czajka, Mateusz Trokielewicz, Piotr Maciejewicz

arxiv:1804.01962 v2 · 2018-04-05 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4AKLZ2PDLB7QZLPZKL6NIDPXOD}

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	2026-05-18T00:01:53.369640Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e014bce9e3587f0cadf952fcd40df770e323b02a472d76699f2da21dca793cc8

Aliases

arxiv: 1804.01962 · arxiv_version: 1804.01962v2 · doi: 10.48550/arxiv.1804.01962 · pith_short_12: 4AKLZ2PDLB7Q · pith_short_16: 4AKLZ2PDLB7QZLPZ · pith_short_8: 4AKLZ2PD

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/4AKLZ2PDLB7QZLPZKL6NIDPXOD \
  | 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: e014bce9e3587f0cadf952fcd40df770e323b02a472d76699f2da21dca793cc8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66ec299815b43a83aea5dc5c2e7700b0136046a67139444289a385dfe7beaa01",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-04-05T17:19:26Z",
    "title_canon_sha256": "6328f983c2d5c5dc56569b12f9fd00f9aa73c6ab23be0d8ce0180f16d31e4111"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.01962",
    "kind": "arxiv",
    "version": 2
  }
}