Pith Number

pith:TRR6NMKQ

pith:2021:TRR6NMKQNQDEVTPVKUKL4BNVRU

not attested not anchored not stored refs pending

Paper card-based vs application-based vaccine credentials: a comparison

Abhishek Singh, Akarsh Venkatasubramanian, Albert Johnson, Anshuman Sharma, Aryan Mahindra, Chandan CV, Ishaan Singh, Kasia Jakimowicz, Priyanshi Katiyar, Ramesh Raskar, Rohan Iyer, Rohan Sukumaran, Saurish Srivastava, Sethuraman TV, Shailesh Advani, Sheshank Shankar

arxiv:2102.04512 v5 · 2021-02-08 · 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{TRR6NMKQNQDEVTPVKUKL4BNVRU}

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	2026-07-05T03:51:05.743438Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c63e6b1506c064acdf55514be05b58d2e7971dd66e7afba806e233c1d5e23b2

Aliases

arxiv: 2102.04512 · arxiv_version: 2102.04512v5 · doi: 10.48550/arxiv.2102.04512 · pith_short_12: TRR6NMKQNQDE · pith_short_16: TRR6NMKQNQDEVTPV · pith_short_8: TRR6NMKQ

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/TRR6NMKQNQDEVTPVKUKL4BNVRU \
  | 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: 9c63e6b1506c064acdf55514be05b58d2e7971dd66e7afba806e233c1d5e23b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b38483850ba656d1ceeefa8afe9af9387bf0ac6091ce84b40077ee63900e8d0d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2021-02-08T20:14:53Z",
    "title_canon_sha256": "c993589b84aa3bd0afd6bd123feb00f49e454b910ef1bfdfcc62d270dcd6b951"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.04512",
    "kind": "arxiv",
    "version": 5
  }
}