Pith Number

pith:MTEXHZ6G

pith:2026:MTEXHZ6GF43KLMQENQIUGQ3SPH

not attested not anchored not stored refs pending

Toward Third-Party Assurance of AI Systems: Design Requirements, Prototype, and Early Testing

Alice Lai, Blaine Kuehnert, Hoda Heidari, Kenneth Holstein, Rachel M. Kim, Rayid Ghani

arxiv:2601.22424 v2 · 2026-01-30 · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MTEXHZ6GF43KLMQENQIUGQ3SPH}

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	2026-06-03T01:05:09.645229Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64c973e7c62f36a5b2046c1143437279ce6eb1297e9df2ae41fd2320d0cdf2f4

Aliases

arxiv: 2601.22424 · arxiv_version: 2601.22424v2 · doi: 10.48550/arxiv.2601.22424 · pith_short_12: MTEXHZ6GF43K · pith_short_16: MTEXHZ6GF43KLMQE · pith_short_8: MTEXHZ6G

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/MTEXHZ6GF43KLMQENQIUGQ3SPH \
  | 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: 64c973e7c62f36a5b2046c1143437279ce6eb1297e9df2ae41fd2320d0cdf2f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6728c7b5ee0bc6acdee285932ebfe2340d71e1751387d0ee69590801dce1a83a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2026-01-30T00:37:12Z",
    "title_canon_sha256": "8117b573eec83f0d03ff3c779e10739ab38ea1d4175e89e514bea9f5a2052c6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.22424",
    "kind": "arxiv",
    "version": 2
  }
}