Pith Number

pith:KWQPSEV7

pith:2019:KWQPSEV7KJFIACBU6AW7Y736IV

not attested not anchored not stored refs pending

An Analysis of United States Online Political Advertising Transparency

Damon McCoy, Laura Edelson, Ratan Dey, Shikhar Sakhuja

arxiv:1902.04385 v1 · 2019-02-12 · 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{KWQPSEV7KJFIACBU6AW7Y736IV}

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	2026-05-17T23:54:12.428275Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55a0f912bf524a800834f02dfc7f7e45778df42eb21ed800f575fbf3757f0c17

Aliases

arxiv: 1902.04385 · arxiv_version: 1902.04385v1 · doi: 10.48550/arxiv.1902.04385 · pith_short_12: KWQPSEV7KJFI · pith_short_16: KWQPSEV7KJFIACBU · pith_short_8: KWQPSEV7

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/KWQPSEV7KJFIACBU6AW7Y736IV \
  | 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: 55a0f912bf524a800834f02dfc7f7e45778df42eb21ed800f575fbf3757f0c17

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed7da18b0134765ae0ce656fa6dd33539fc386ed39e1f99eb3010622449ac35b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2019-02-12T13:48:46Z",
    "title_canon_sha256": "d4e6bbd067e517e9e3f40c0284d0e74cb88cd45e7b6e0c67da9b25a7df8de480"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.04385",
    "kind": "arxiv",
    "version": 1
  }
}