Pith Number

pith:APU4JYB5

pith:2026:APU4JYB5GF6QDFVQG5TLIRAJZC

not attested not anchored not stored refs pending

Building a User Foundation Model for the Open Web

Bla\v{z} \v{S}krlj, Ivan Can Arisoy, Merwan Barlier, Solal Vernier

arxiv:2607.28019 v1 · 2026-07-30 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{APU4JYB5GF6QDFVQG5TLIRAJZC}

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	2026-07-31T01:35:16.382773Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

03e9c4e03d317d0196b03766b44409c88cbd86de409b218415d67542036111a1

Aliases

arxiv: 2607.28019 · arxiv_version: 2607.28019v1 · doi: 10.48550/arxiv.2607.28019 · pith_short_12: APU4JYB5GF6Q · pith_short_16: APU4JYB5GF6QDFVQ · pith_short_8: APU4JYB5

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/APU4JYB5GF6QDFVQG5TLIRAJZC \
  | 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: 03e9c4e03d317d0196b03766b44409c88cbd86de409b218415d67542036111a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53bb9040706cf71c03fa2dece567458ffa2e1f52b82052421b2e66d284fff18b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-07-30T11:07:54Z",
    "title_canon_sha256": "98effb3f5fe303bdf195d12097aa3b0ff72d49b301cfa27b9529dcc37ae22162"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.28019",
    "kind": "arxiv",
    "version": 1
  }
}