Pith Number

pith:36XGAG7G

pith:2022:36XGAG7GVAOYFZYNPXVKIEP5J7

not attested not anchored not stored refs pending

SURDS: Self-Supervised Attention-guided Reconstruction and Dual Triplet Loss for Writer Independent Offline Signature Verification

Saumik Bhattacharya, Siladittya Manna, Soumitri Chattopadhyay, Umapada Pal

arxiv:2201.10138 v2 · 2022-01-25 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{36XGAG7GVAOYFZYNPXVKIEP5J7}

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	2026-07-05T04:34:50.054911Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dfae601be6a81d82e70d7deaa411fd4fce8b9583e9356c2be8fc37b0abc2fde2

Aliases

arxiv: 2201.10138 · arxiv_version: 2201.10138v2 · doi: 10.48550/arxiv.2201.10138 · pith_short_12: 36XGAG7GVAOY · pith_short_16: 36XGAG7GVAOYFZYN · pith_short_8: 36XGAG7G

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/36XGAG7GVAOYFZYNPXVKIEP5J7 \
  | 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: dfae601be6a81d82e70d7deaa411fd4fce8b9583e9356c2be8fc37b0abc2fde2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e4fd574f4ef5eead1ba0dd4471f5bd00cbcb7c87abca4e9c5bfbe41314cd9913",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2022-01-25T07:26:55Z",
    "title_canon_sha256": "207fb33dd8e353ea5403821bc518203c2136e201afdba3ba387e3d12d72f5992"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2201.10138",
    "kind": "arxiv",
    "version": 2
  }
}