Pith Number

pith:A2AKA4HI

pith:2026:A2AKA4HIPC3D3WUCYHZFDNGLA5

not attested not anchored not stored refs pending

MedBeads: An Agent-Native, Immutable Data Substrate for Trustworthy Medical AI

Takahito Nakajima

arxiv:2602.01086 v2 · 2026-02-01 · cs.AI · cs.CR · cs.DB · cs.DC · cs.SE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A2AKA4HIPC3D3WUCYHZFDNGLA5}

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	2026-05-26T01:02:31.585836Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0680a070e878b63dda82c1f251b4cb07512c1c13deb3e9c650d17ee413333557

Aliases

arxiv: 2602.01086 · arxiv_version: 2602.01086v2 · doi: 10.48550/arxiv.2602.01086 · pith_short_12: A2AKA4HIPC3D · pith_short_16: A2AKA4HIPC3D3WUC · pith_short_8: A2AKA4HI

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/A2AKA4HIPC3D3WUCYHZFDNGLA5 \
  | 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: 0680a070e878b63dda82c1f251b4cb07512c1c13deb3e9c650d17ee413333557

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5171940debc21537bbe877767da9ede6d6c6041d6fe7bbb2e5bcdfb972ad9d80",
    "cross_cats_sorted": [
      "cs.CR",
      "cs.DB",
      "cs.DC",
      "cs.SE"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-02-01T08:03:20Z",
    "title_canon_sha256": "a74ef35b0bfc79700fb989cbf5729d2d54de89a6de264acc101c4457b56f63db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.01086",
    "kind": "arxiv",
    "version": 2
  }
}