Pith Number

pith:B34QO4RS

pith:2021:B34QO4RSXQLVPLDH2W2VY4KFBE

not attested not anchored not stored refs pending

MIT SafePaths Card (MiSaCa): Augmenting Paper Based Vaccination Cards with Printed Codes

Abhishek Singh, Anshuman Sharma, Apurv Shekhar, Aryan Mahindra, Colin Kang, Darshan Gandhi, Ishaan Singh, Joseph Bae, Krishnendu Dasgupta, Maurizio Arseni, Orna Mukhopadhyay, Parth Patwa, Priyanshi Katiyar, Qamil Mirza, Ramesh Raskar, Rohan Iyer, Rohan Sukumaran, Saras Agrawal, Saurish Srivastava, Sethuramen TV, Sheshank Shankar, Sifat Hasan

arxiv:2101.07931 v2 · 2021-01-20 · cs.CY · 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{B34QO4RSXQLVPLDH2W2VY4KFBE}

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	2026-07-05T02:08:33.665414Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ef9077232bc1757ac67d5b55c7145090b6aa9f477f03a7accb553aa6cbb43d7

Aliases

arxiv: 2101.07931 · arxiv_version: 2101.07931v2 · doi: 10.48550/arxiv.2101.07931 · pith_short_12: B34QO4RSXQLV · pith_short_16: B34QO4RSXQLVPLDH · pith_short_8: B34QO4RS

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/B34QO4RSXQLVPLDH2W2VY4KFBE \
  | 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: 0ef9077232bc1757ac67d5b55c7145090b6aa9f477f03a7accb553aa6cbb43d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "27b94c169ac304c77320c055cdcf4937723daa34d066b4dbaccfbfdad2ed0a39",
    "cross_cats_sorted": [
      "cs.CR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2021-01-20T02:22:56Z",
    "title_canon_sha256": "cccfa2bfc58987493df4988a26f8e4a9d5e20fb791466559f0e942aecc47f457"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.07931",
    "kind": "arxiv",
    "version": 2
  }
}