Pith Number

pith:BCRFMH4O

pith:2026:BCRFMH4OVAL667JJIVS75DBPTB

not attested not anchored not stored refs pending

Schema-Grounded LLM Extraction for FHIR Patient Digital Twins

Luoxi Tang, Rafael Brens, Yuqiao Meng, Zhaohan Xi

arxiv:2601.05847 v2 · 2026-01-09 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BCRFMH4OVAL667JJIVS75DBPTB}

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	2026-05-26T01:02:30.431297Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08a2561f8ea817ef7d294565fe8c2f9865aea952f953b1326597c456bce987b5

Aliases

arxiv: 2601.05847 · arxiv_version: 2601.05847v2 · doi: 10.48550/arxiv.2601.05847 · pith_short_12: BCRFMH4OVAL6 · pith_short_16: BCRFMH4OVAL667JJ · pith_short_8: BCRFMH4O

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/BCRFMH4OVAL667JJIVS75DBPTB \
  | 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: 08a2561f8ea817ef7d294565fe8c2f9865aea952f953b1326597c456bce987b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5c6c9866227e02c504057afe38219df667907a0fe6e110d72656aecd2d52d68",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-01-09T15:20:11Z",
    "title_canon_sha256": "3acc5c424935b7ecd7a5fa16e49d5617f50949c165f1be1fdf68f732c8fbe03b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.05847",
    "kind": "arxiv",
    "version": 2
  }
}