Pith Number

pith:WGA7DOYZ

pith:2021:WGA7DOYZIRUM3YM7IVMXWAFB54

not attested not anchored not stored refs pending

The Way to my Heart is through Contrastive Learning: Remote Photoplethysmography from Unlabelled Video

John Gideon, Simon Stent

arxiv:2111.09748 v1 · 2021-11-18 · cs.CV · cs.HC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WGA7DOYZIRUM3YM7IVMXWAFB54}

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	2026-07-05T03:33:15.055728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b181f1bb194468cde19f45597b00a1ef3ebaa45b601cb00ec18ddb7263c66dee

Aliases

arxiv: 2111.09748 · arxiv_version: 2111.09748v1 · doi: 10.48550/arxiv.2111.09748 · pith_short_12: WGA7DOYZIRUM · pith_short_16: WGA7DOYZIRUM3YM7 · pith_short_8: WGA7DOYZ

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/WGA7DOYZIRUM3YM7IVMXWAFB54 \
  | 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: b181f1bb194468cde19f45597b00a1ef3ebaa45b601cb00ec18ddb7263c66dee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bada9a00e35896ab46823e556688c04a0b231d77216916770752fb66784af64d",
    "cross_cats_sorted": [
      "cs.HC"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-11-18T15:21:33Z",
    "title_canon_sha256": "8bc056278df1be7e8c9231156bc28693e9652df866b19669ac8ef0ba7a7ce8ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.09748",
    "kind": "arxiv",
    "version": 1
  }
}