Pith Number

pith:CY5BZNOF

pith:2021:CY5BZNOF2N2BSFQLQLC4GPON3B

not attested not anchored not stored refs pending

Identification-Detection Group Testing Protocols for COVID-19 at High Prevalence

Enrico Paolini, Gianluigi Liva, Marco Chiani

arxiv:2104.11305 v2 · 2021-04-22 · physics.soc-ph · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CY5BZNOF2N2BSFQLQLC4GPON3B}

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	2026-07-05T04:02:53.290305Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

163a1cb5c5d37419160b82c5c33dcdd85e3e101c4b02d7fc440f5a7bdaeac299

Aliases

arxiv: 2104.11305 · arxiv_version: 2104.11305v2 · doi: 10.48550/arxiv.2104.11305 · pith_short_12: CY5BZNOF2N2B · pith_short_16: CY5BZNOF2N2BSFQL · pith_short_8: CY5BZNOF

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/CY5BZNOF2N2BSFQLQLC4GPON3B \
  | 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: 163a1cb5c5d37419160b82c5c33dcdd85e3e101c4b02d7fc440f5a7bdaeac299

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac0f2aad379c41833b293413908f837f213ad4c3af16479bbfeac2e64561b3ed",
    "cross_cats_sorted": [
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2021-04-22T20:15:01Z",
    "title_canon_sha256": "c32c626e1da52785d976a49299d9088afc6e14667bda4f65806fac80a32d8289"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.11305",
    "kind": "arxiv",
    "version": 2
  }
}