Pith Number

pith:N2CWZP7Z

pith:2015:N2CWZP7ZLINARVNXNNDWS2OEGY

not attested not anchored not stored refs pending

Detecting and Preventing "Multiple-Account" Cheating in Massive Open Online Courses

Andrew D. Ho, Curtis G. Northcutt, Isaac L. Chuang

arxiv:1508.05699 v3 · 2015-08-24 · cs.CY · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N2CWZP7ZLINARVNXNNDWS2OEGY}

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	2026-05-18T01:33:41.765172Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e856cbff95a1a08d5b76b476969c43608509a5a03e3ce2d7c8c7bdefbfd281f

Aliases

arxiv: 1508.05699 · arxiv_version: 1508.05699v3 · doi: 10.48550/arxiv.1508.05699 · pith_short_12: N2CWZP7ZLINA · pith_short_16: N2CWZP7ZLINARVNX · pith_short_8: N2CWZP7Z

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/N2CWZP7ZLINARVNXNNDWS2OEGY \
  | 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: 6e856cbff95a1a08d5b76b476969c43608509a5a03e3ce2d7c8c7bdefbfd281f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf778781801ba4521ae6af74d0c90292b21a44b421d10c290ae523820188d47a",
    "cross_cats_sorted": [
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2015-08-24T04:58:05Z",
    "title_canon_sha256": "6bd2fc298e81481e69847ca146658c049f227872e72ca1b2ec6d679d150e6a3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05699",
    "kind": "arxiv",
    "version": 3
  }
}