Pith Number

pith:2UFDLLV6

pith:2026:2UFDLLV6L5EB3IW55VCPO43LO2

not attested not anchored not stored refs pending

Pixel Watch: Robust Heart Rate Sensing from Multipath PPG and On-Device Deep Learning Trained on 10,000 hours of Free-Living and Fitness Data

Abhinuv Pitale, Antony Siahaan, Benjamin Stone, Brennan Garrett, Dan Howe, Daniel Roggen, Derrick Vickers, Dimitris Spathis, Erika Siegel, Hamed Vavadi, Justin Phillips, Katarina Vukosavljevic, Matt Wimmer, Megan Walker, Oleksiy Vyalov, Pete Richards, Robert Harle, Sam Mravca, Shwetak Patel, Shyam Tailor, Soren Brage, Stefanie Hollidge, Steve Diamond, Tien Le, Tracy Giest, Tuan Phan, Vik Sharma, Yojan Patel, YongSuk Cho

arxiv:2606.21436 v1 · 2026-06-19 · 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{2UFDLLV6L5EB3IW55VCPO43LO2}

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	2026-06-23T01:13:10.227681Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d50a35aebe5f481da2dded44f7736b768f3f364d82bd51d51cf0aa27648668e7

Aliases

arxiv: 2606.21436 · arxiv_version: 2606.21436v1 · doi: 10.48550/arxiv.2606.21436 · pith_short_12: 2UFDLLV6L5EB · pith_short_16: 2UFDLLV6L5EB3IW5 · pith_short_8: 2UFDLLV6

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/2UFDLLV6L5EB3IW55VCPO43LO2 \
  | 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: d50a35aebe5f481da2dded44f7736b768f3f364d82bd51d51cf0aa27648668e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f81bcc0118b1bb364cba9781adb38dbbee6f94195d01995f935d3f7d5cf1ad9f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2026-06-19T13:56:32Z",
    "title_canon_sha256": "9c9c954ad6800086661c0f40c5421775c7bd332cd3812172f6fbac1948a9d0c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.21436",
    "kind": "arxiv",
    "version": 1
  }
}