Pith Number

pith:NP6FBJV2

pith:2022:NP6FBJV2NROXLO6W7N42WRU37G

not attested not anchored not stored refs pending

Knowledge-Free Black-Box Watermark and Ownership Proof for Image Classification Neural Networks

Fangqi Li, Shilin Wang

arxiv:2204.04522 v1 · 2022-04-09 · cs.CR · cs.CV · cs.MM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NP6FBJV2NROXLO6W7N42WRU37G}

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	2026-07-05T04:12:58.217708Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bfc50a6ba6c5d75bbd6fb79ab469bf99d25bef7229faec69ee1a243aca3f62c

Aliases

arxiv: 2204.04522 · arxiv_version: 2204.04522v1 · doi: 10.48550/arxiv.2204.04522 · pith_short_12: NP6FBJV2NROX · pith_short_16: NP6FBJV2NROXLO6W · pith_short_8: NP6FBJV2

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/NP6FBJV2NROXLO6W7N42WRU37G \
  | 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: 6bfc50a6ba6c5d75bbd6fb79ab469bf99d25bef7229faec69ee1a243aca3f62c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aea6b1e27e4e6f9b1de17be301031ce2a3710bb6f8bb70fa45f146aa2bc71467",
    "cross_cats_sorted": [
      "cs.CV",
      "cs.MM"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2022-04-09T18:09:02Z",
    "title_canon_sha256": "ac2b9fc175e83b57319286e2afcef2caa64625de3ed48d42b935e4491974a09c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2204.04522",
    "kind": "arxiv",
    "version": 1
  }
}