Pith Number

pith:CDCBIOUI

pith:2020:CDCBIOUIKPIIS2UOFJIDV7FSBA

not attested not anchored not stored refs pending

ACDC-Tracing: Towards Anonymous Citizen-Driven Contact Tracing

Kristof Roomp, Nuria Oliver

arxiv:2004.07463 v1 · 2020-04-16 · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CDCBIOUIKPIIS2UOFJIDV7FSBA}

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	2026-07-05T00:55:33.406611Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10c4143a8853d0896a8e2a503afcb20812cd974fdb1bb983d7f8e5e35770d986

Aliases

arxiv: 2004.07463 · arxiv_version: 2004.07463v1 · doi: 10.48550/arxiv.2004.07463 · pith_short_12: CDCBIOUIKPII · pith_short_16: CDCBIOUIKPIIS2UO · pith_short_8: CDCBIOUI

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/CDCBIOUIKPIIS2UOFJIDV7FSBA \
  | 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: 10c4143a8853d0896a8e2a503afcb20812cd974fdb1bb983d7f8e5e35770d986

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0a9e9f1423761cdcaf12518c40d660dd603f2a2b46a0043f15183e2a1fbd42b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2020-04-16T05:16:08Z",
    "title_canon_sha256": "1febd6cea9f4f2b6c04d2ebdb6ee040ec49817083d7bdab2ec9073d61b1a2f88"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.07463",
    "kind": "arxiv",
    "version": 1
  }
}