Pith Number

pith:TJXKFGBG

pith:2012:TJXKFGBGAZWAO4FGKPCJH2IT5F

not attested not anchored not stored refs pending

Spread Spectrum based Robust Image Watermark Authentication

S. K. Sarkar, T. S. Das, V. H. Mankar

arxiv:1207.2701 v1 · 2012-07-11 · 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{TJXKFGBGAZWAO4FGKPCJH2IT5F}

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	2026-05-18T03:51:14.760962Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9a6ea29826066c0770a653c493e913e94c41a9119610fe973cee3db559703634

Aliases

arxiv: 1207.2701 · arxiv_version: 1207.2701v1 · doi: 10.48550/arxiv.1207.2701 · pith_short_12: TJXKFGBGAZWA · pith_short_16: TJXKFGBGAZWAO4FG · pith_short_8: TJXKFGBG

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/TJXKFGBGAZWAO4FGKPCJH2IT5F \
  | 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: 9a6ea29826066c0770a653c493e913e94c41a9119610fe973cee3db559703634

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e1f098eecfef48430d0a1c9ab6992c42f90901abddd5728e3511c6a70b3f88e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2012-07-11T16:28:43Z",
    "title_canon_sha256": "3294f1763788c7823a292bb3248e7be32fba4fd8f0158da4b63e7bd78620fb5f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.2701",
    "kind": "arxiv",
    "version": 1
  }
}