Pith Number

pith:C5U25CYO

pith:2012:C5U25CYOM3L2CIP7C7IFY4ZSMH

not attested not anchored not stored refs pending

GA based robust blind digital watermarking

Amparo Osuna, Elena Mart\'in, F\'elix Gudiel, Jos\'e-Andr\'es Armario, Mar\'ia-Bel\'en G\"uemes, Mar\'ia-Dolores Frau, V\'ictor \'Alvarez

arxiv:1201.4354 v1 · 2012-01-20 · math.CO · cs.CR · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C5U25CYOM3L2CIP7C7IFY4ZSMH}

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	2026-05-18T04:04:07.334123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1769ae8b0e66d7a121ff17d05c733261f621167b64f9b5e73c143ac49940cbf0

Aliases

arxiv: 1201.4354 · arxiv_version: 1201.4354v1 · doi: 10.48550/arxiv.1201.4354 · pith_short_12: C5U25CYOM3L2 · pith_short_16: C5U25CYOM3L2CIP7 · pith_short_8: C5U25CYO

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/C5U25CYOM3L2CIP7C7IFY4ZSMH \
  | 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: 1769ae8b0e66d7a121ff17d05c733261f621167b64f9b5e73c143ac49940cbf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40c6d6db18c790ae07a83a5d523ba404adf3adb0581a47d013d82a4ed1e99e2a",
    "cross_cats_sorted": [
      "cs.CR",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-01-20T18:01:14Z",
    "title_canon_sha256": "220f5c50ae7865ece0841d8052e927ebff32ba1682784fe74253ad9fff7cd828"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.4354",
    "kind": "arxiv",
    "version": 1
  }
}