Pith Number

pith:5VXPSWET

pith:2020:5VXPSWETZOHAOVEFHQEBAGWRIF

not attested not anchored not stored refs pending

Demystifying COVID-19 digital contact tracing: A survey on frameworks and mobile apps

Georgios Kambourakis, Georgios Karopoulos, Igor Nai Fovino, Jos\'e L. Hern\'andez-Ramos, Tania Martin

arxiv:2007.11687 v2 · 2020-07-22 · 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{5VXPSWETZOHAOVEFHQEBAGWRIF}

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	2026-07-05T01:36:10.038144Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ed6ef95893cb8e0754853c08101ad1415dde4f9f0136df04a0da381776586481

Aliases

arxiv: 2007.11687 · arxiv_version: 2007.11687v2 · doi: 10.48550/arxiv.2007.11687 · pith_short_12: 5VXPSWETZOHA · pith_short_16: 5VXPSWETZOHAOVEF · pith_short_8: 5VXPSWET

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/5VXPSWETZOHAOVEFHQEBAGWRIF \
  | 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: ed6ef95893cb8e0754853c08101ad1415dde4f9f0136df04a0da381776586481

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7325552f8857f13989e60f42182a8eaeab4e1b7baf8da7015a3ab301804866ff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2020-07-22T21:22:20Z",
    "title_canon_sha256": "30d1c1cca4e058787cd9930f28344f5beec6f806f1a4867e954c26f5a3a13f5a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.11687",
    "kind": "arxiv",
    "version": 2
  }
}