Pith Number

pith:6BJCOHYU

pith:2026:6BJCOHYUFJPM2CP53TUMD4JCUD

not attested not anchored not stored refs pending

Value-of-Information Analysis for External Validation of Risk Prediction Models in Multicenter Studies and Systematic Reviews

Andrea Gabrio, Andrew Vickers, Ben Van Calster, Ewout Steyerberg, Kim Zhipei Wang, Laure Wynants, Mohsen Sadatsafavi, Sabine Grimm

arxiv:2607.02321 v1 · 2026-07-02 · stat.AP · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6BJCOHYUFJPM2CP53TUMD4JCUD}

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	2026-07-03T01:17:48.421905Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f052271f142a5ecd09fddce8c1f122a0e4c39c786334d381e3f4030f76bcb8fd

Aliases

arxiv: 2607.02321 · arxiv_version: 2607.02321v1 · doi: 10.48550/arxiv.2607.02321 · pith_short_12: 6BJCOHYUFJPM · pith_short_16: 6BJCOHYUFJPM2CP5 · pith_short_8: 6BJCOHYU

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/6BJCOHYUFJPM2CP53TUMD4JCUD \
  | 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: f052271f142a5ecd09fddce8c1f122a0e4c39c786334d381e3f4030f76bcb8fd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c78a9768ef48f1c67235f91467c30c8fe630e4180dc5e496f1124864063a256d",
    "cross_cats_sorted": [
      "stat.ME"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2026-07-02T15:30:21Z",
    "title_canon_sha256": "2d6c0c10cccf6713fc9b59fd8072f409483b221d2d710cc30f3a0df1b4033f2a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.02321",
    "kind": "arxiv",
    "version": 1
  }
}