Pith Number

pith:7DRRBNYG

pith:2019:7DRRBNYGEJTSU6ZFYI7GGYPCZW

not attested not anchored not stored refs pending

Generalized Presentation Attack Detection: a face anti-spoofing evaluation proposal

Artur Costa-Pazo, David Jimenez-Cabello, Esteban Vazquez-Fernandez, Jose L. Alba-Castro, Roberto J. L\'opez-Sastre

arxiv:1904.06213 v1 · 2019-04-12 · 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{7DRRBNYGEJTSU6ZFYI7GGYPCZW}

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	2026-05-17T23:48:43.827710Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8e310b70622672a7b25c23e6361e2cd8cea609fb7ffc0596efe611d54c1a3cf

Aliases

arxiv: 1904.06213 · arxiv_version: 1904.06213v1 · doi: 10.48550/arxiv.1904.06213 · pith_short_12: 7DRRBNYGEJTS · pith_short_16: 7DRRBNYGEJTSU6ZF · pith_short_8: 7DRRBNYG

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/7DRRBNYGEJTSU6ZFYI7GGYPCZW \
  | 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: f8e310b70622672a7b25c23e6361e2cd8cea609fb7ffc0596efe611d54c1a3cf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7bb95dc80643c3ff23230d0455033c205e53f79d6f4d0d55ad395318a0a1d9b5",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-04-12T12:57:54Z",
    "title_canon_sha256": "21eaaa5c8f9fc7088c6288a08a236ff161f4d7bcffc293d50e0dc478505d7a4e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.06213",
    "kind": "arxiv",
    "version": 1
  }
}