Pith Number

pith:F4IW3VVB

pith:2026:F4IW3VVBNODOUHSV5FTZZBBEXU

not attested not anchored not stored refs pending

The Checking Problem: What must be true before AI ships in a regulated firm

Prerit Ahuja

arxiv:2607.28666 v1 · 2026-07-25 · cs.CL · 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{F4IW3VVBNODOUHSV5FTZZBBEXU}

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	2026-08-03T00:12:06.708000Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f116dd6a16b86ea1e55e9679c8424bd281bae802bf28640897caab04e660ae9

Aliases

arxiv: 2607.28666 · arxiv_version: 2607.28666v1 · doi: 10.48550/arxiv.2607.28666 · pith_short_12: F4IW3VVBNODO · pith_short_16: F4IW3VVBNODOUHSV · pith_short_8: F4IW3VVB

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/F4IW3VVBNODOUHSV5FTZZBBEXU \
  | 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: 2f116dd6a16b86ea1e55e9679c8424bd281bae802bf28640897caab04e660ae9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "33e95895966161821f8d3d5bb98db3b89397d3f0f3bd10c8a2291de8937a22e0",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-07-25T02:35:12Z",
    "title_canon_sha256": "1b10b6bee9352cffb29bb4e866b3786e06df838169ed3388518281dc27f1d06d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.28666",
    "kind": "arxiv",
    "version": 1
  }
}