Pith Number

pith:UGZFKHR6

pith:2018:UGZFKHR664URSZLZETCCQUNQOR

not attested not anchored not stored refs pending

Presentation Attack Detection for Cadaver Iris

Adam Czajka, Mateusz Trokielewicz, Piotr Maciejewicz

arxiv:1807.04058 v2 · 2018-07-11 · 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{UGZFKHR664URSZLZETCCQUNQOR}

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	2026-05-18T00:09:41.301867Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1b2551e3ef72919657924c42851b074702ac4761a1691eca655a92e4bd662df

Aliases

arxiv: 1807.04058 · arxiv_version: 1807.04058v2 · doi: 10.48550/arxiv.1807.04058 · pith_short_12: UGZFKHR664UR · pith_short_16: UGZFKHR664URSZLZ · pith_short_8: UGZFKHR6

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/UGZFKHR664URSZLZETCCQUNQOR \
  | 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: a1b2551e3ef72919657924c42851b074702ac4761a1691eca655a92e4bd662df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "59fff9edd0b5dd8d8149e87478169e26a8fa9c27c200501c635618449d1a7b3a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-07-11T10:35:22Z",
    "title_canon_sha256": "6f3faaa70242b11c27f1a0cc52cd1a978376913dcfb3446e254417d5efd0d56a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.04058",
    "kind": "arxiv",
    "version": 2
  }
}