Pith Number

pith:QDJJA2WJ

pith:2016:QDJJA2WJIFYFXRA7NIM7THNLPA

not attested not anchored not stored refs pending

mPDF: Framework for Watermarking PDF Files using Image Watermarking Algorithms

Balakrishnan Prabhakaran, Derrick Newton, Rajarathnam Nallusamy, Sachin Mehta

arxiv:1610.02443 v1 · 2016-10-07 · 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{QDJJA2WJIFYFXRA7NIM7THNLPA}

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	2026-05-18T01:02:51.496419Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80d2906ac941705bc41f6a19f99dab781e9dd1748d34887645fb9e958aecfa7f

Aliases

arxiv: 1610.02443 · arxiv_version: 1610.02443v1 · doi: 10.48550/arxiv.1610.02443 · pith_short_12: QDJJA2WJIFYF · pith_short_16: QDJJA2WJIFYFXRA7 · pith_short_8: QDJJA2WJ

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/QDJJA2WJIFYFXRA7NIM7THNLPA \
  | 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: 80d2906ac941705bc41f6a19f99dab781e9dd1748d34887645fb9e958aecfa7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "64935e725e4fe02f461741fdac6dc246267d008d68dbe06ec54d5e52d09a8009",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.MM",
    "submitted_at": "2016-10-07T23:06:09Z",
    "title_canon_sha256": "c75fbaf23bd955f68a32a5c6fb4e5d3f606a939bba035b09e03c4d00c82d3a1d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1610.02443",
    "kind": "arxiv",
    "version": 1
  }
}