Pith Number

pith:Z5KJ4MF6

pith:2026:Z5KJ4MF6TOQFX4HEFRAJTKKHQK

not attested not anchored not stored refs pending

PorTEXTO: A European Portuguese Benchmark for Visual Text Extraction

David Semedo, Diogo Gl\'oria-Silva, Diogo Tavares, Jo\~ao Cardeira, Jo\~ao Magalh\~aes, Manuel Letras da Luz, Rafael Ferreira

arxiv:2606.19096 v1 · 2026-06-17 · 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{Z5KJ4MF6TOQFX4HEFRAJTKKHQK}

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	2026-06-19T16:11:56.489112Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf549e30be9ba05bf0e42c4099a94782a05eaf34589b3c8e2d4279a7cc5e4db4

Aliases

arxiv: 2606.19096 · arxiv_version: 2606.19096v1 · doi: 10.48550/arxiv.2606.19096 · pith_short_12: Z5KJ4MF6TOQF · pith_short_16: Z5KJ4MF6TOQFX4HE · pith_short_8: Z5KJ4MF6

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/Z5KJ4MF6TOQFX4HEFRAJTKKHQK \
  | 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: cf549e30be9ba05bf0e42c4099a94782a05eaf34589b3c8e2d4279a7cc5e4db4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de37a66ace6c1b9baa5a500510d79be2845fda49f7d9ec488ddd4104b5a7ee49",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-06-17T14:06:26Z",
    "title_canon_sha256": "b8e548a1b48fc879eaa5f31fd956e1cfb6335b99dc8030274615e857d940f172"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.19096",
    "kind": "arxiv",
    "version": 1
  }
}