Pith Number

pith:IJQHWYMA

pith:2021:IJQHWYMAPN4HSKERTODW7ST5ZU

not attested not anchored not stored refs pending

A Unified Model for Fingerprint Authentication and Presentation Attack Detection

Additya Popli, Anoop Namboodiri, Atsushi Okubo, Joshua J. Engelsma, Naoyuki Onoe, Saraansh Tandon

arxiv:2104.03255 v3 · 2021-04-07 · 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{IJQHWYMAPN4HSKERTODW7ST5ZU}

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	2026-07-05T03:00:09.058976Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42607b61807b787928919b876fca7dcd004cdff1871f2a556bbe9058441f5c78

Aliases

arxiv: 2104.03255 · arxiv_version: 2104.03255v3 · doi: 10.48550/arxiv.2104.03255 · pith_short_12: IJQHWYMAPN4H · pith_short_16: IJQHWYMAPN4HSKER · pith_short_8: IJQHWYMA

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/IJQHWYMAPN4HSKERTODW7ST5ZU \
  | 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: 42607b61807b787928919b876fca7dcd004cdff1871f2a556bbe9058441f5c78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b28f0b75749f9da6f043a4be0d3cab5a721ea14f2600d3aad14aafbef486954",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-04-07T16:57:38Z",
    "title_canon_sha256": "9a50dcd299fa4a54e01394768578409645f632bc26acba24450fcacb30ce19d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.03255",
    "kind": "arxiv",
    "version": 3
  }
}