Pith Number

pith:QHRD2VHO

pith:2019:QHRD2VHOL6MT6TPH7DOVLCWRQD

not attested not anchored not stored refs pending

StegaStamp: Invisible Hyperlinks in Physical Photographs

Ben Mildenhall, Matthew Tancik, Ren Ng

arxiv:1904.05343 v2 · 2019-04-10 · 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{QHRD2VHOL6MT6TPH7DOVLCWRQD}

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	2026-07-05T00:50:42.866462Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81e23d54ee5f993f4de7f8dd558ad180e5e1bbb1c9952f69325bfb5e81f049d8

Aliases

arxiv: 1904.05343 · arxiv_version: 1904.05343v2 · doi: 10.48550/arxiv.1904.05343 · pith_short_12: QHRD2VHOL6MT · pith_short_16: QHRD2VHOL6MT6TPH · pith_short_8: QHRD2VHO

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/QHRD2VHOL6MT6TPH7DOVLCWRQD \
  | 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: 81e23d54ee5f993f4de7f8dd558ad180e5e1bbb1c9952f69325bfb5e81f049d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "71386bee23ec480dc7e81376c098963667abcf200a9c79e3cac80f213779e209",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-04-10T17:53:38Z",
    "title_canon_sha256": "0b7d7bf4e0fd93e5413a439fea8733650d4e7ccf64b4d77412110df83e996b26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.05343",
    "kind": "arxiv",
    "version": 2
  }
}