Pith Number

pith:M7C4O5SU

pith:2020:M7C4O5SUDHZLWYB4EU7VZHHPN4

not attested not anchored not stored refs pending

BeepTrace: Blockchain-enabled Privacy-preserving Contact Tracing for COVID-19 Pandemic and Beyond

Hao Xu, Lei Zhang, Muhammad Ali Imran, Oluwakayode Onireti, William Bill Buchanan, Yang Fang

arxiv:2005.10103 v3 · 2020-05-20 · cs.DC · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M7C4O5SUDHZLWYB4EU7VZHHPN4}

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	2026-07-05T03:42:19.460012Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67c5c7765419f2bb603c253f5c9cef6f0106b6f411c9223feb6035e0b6d4eaa6

Aliases

arxiv: 2005.10103 · arxiv_version: 2005.10103v3 · doi: 10.48550/arxiv.2005.10103 · pith_short_12: M7C4O5SUDHZL · pith_short_16: M7C4O5SUDHZLWYB4 · pith_short_8: M7C4O5SU

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/M7C4O5SUDHZLWYB4EU7VZHHPN4 \
  | 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: 67c5c7765419f2bb603c253f5c9cef6f0106b6f411c9223feb6035e0b6d4eaa6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8bb2af3e6b10e3293fb4965b7ee0d8206c96e3862920754fd0b1a3b1b1c11d78",
    "cross_cats_sorted": [
      "cs.CR"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.DC",
    "submitted_at": "2020-05-20T15:04:43Z",
    "title_canon_sha256": "28d2eb0984a43e4e8a6c800ae2eb1d14790594e1bb21cfe78242051057e05bb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2005.10103",
    "kind": "arxiv",
    "version": 3
  }
}