Pith Number

pith:NHELC4SO

pith:2012:NHELC4SOKEEP4WRQJVQQVSBHNB

not attested not anchored not stored refs pending

Crowdsourcing for Usability Testing

Di Liu, Matthew Lease, Randolph Bias, Rebecca Kuipers

arxiv:1203.1468 v2 · 2012-03-07 · 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{NHELC4SOKEEP4WRQJVQQVSBHNB}

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	2026-05-18T04:00:37.522185Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69c8b1724e5108fe5a304d610ac827687f707b2223b64acf8af19cf486390b48

Aliases

arxiv: 1203.1468 · arxiv_version: 1203.1468v2 · doi: 10.48550/arxiv.1203.1468 · pith_short_12: NHELC4SOKEEP · pith_short_16: NHELC4SOKEEP4WRQ · pith_short_8: NHELC4SO

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/NHELC4SOKEEP4WRQJVQQVSBHNB \
  | 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: 69c8b1724e5108fe5a304d610ac827687f707b2223b64acf8af19cf486390b48

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dbdf33fcb8037e83ff286a6c92640934996a01c22ef1d808b2720abe7d5b5459",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2012-03-07T13:46:32Z",
    "title_canon_sha256": "9c3603d8a9af77a21db24aee7b8401e4fec44318822d9260cc6120c7bd9c3467"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.1468",
    "kind": "arxiv",
    "version": 2
  }
}