Pith Number

pith:YN7FD7CS

pith:2021:YN7FD7CSISQ7RZSZH77VBXGET6

not attested not anchored not stored refs pending

BU-Trace: A Permissionless Mobile System for Privacy-Preserving Intelligent Contact Tracing

Haixin Wang, Jianliang Xu, Jinbin Huang, Li Chen, Shihao Wang, Xiaowen Chu, Xiaoyi Fu, Xin Huang, Xinzhi Zhang, Yike Guo, Zhe Peng

arxiv:2101.09653 v1 · 2021-01-24 · cs.SI · cs.CR · 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{YN7FD7CSISQ7RZSZH77VBXGET6}

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	2026-07-05T02:09:21.443655Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c37e51fc5244a1f8e6593fff50dcc49fa5a02642e3979cb3c879b603a3915a09

Aliases

arxiv: 2101.09653 · arxiv_version: 2101.09653v1 · doi: 10.48550/arxiv.2101.09653 · pith_short_12: YN7FD7CSISQ7 · pith_short_16: YN7FD7CSISQ7RZSZ · pith_short_8: YN7FD7CS

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/YN7FD7CSISQ7RZSZH77VBXGET6 \
  | 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: c37e51fc5244a1f8e6593fff50dcc49fa5a02642e3979cb3c879b603a3915a09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "540b0b76604a10c7bd269532116aeabf7b9323f8664a58ed37dd81a5bb91f73a",
    "cross_cats_sorted": [
      "cs.CR",
      "cs.CY"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2021-01-24T06:11:09Z",
    "title_canon_sha256": "ba3c583f1402d628bc5ba9712905fd6fcc94864ed639f42c2556cf7df24b3585"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.09653",
    "kind": "arxiv",
    "version": 1
  }
}