Pith Number

pith:2GTTGRIA

pith:2019:2GTTGRIAJLE2R7CBIROS2TVVTR

not attested not anchored not stored refs pending

UPI-Net: Semantic Contour Detection in Placental Ultrasound

Huan Qi, J. Alison Noble, Sally Collins

arxiv:1909.00229 v2 · 2019-08-31 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2GTTGRIAJLE2R7CBIROS2TVVTR}

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	2026-07-05T00:04:29.985344Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1a73345004ac9a8fc41445d2d4eb59c6be3b37a0b856039e3c69cd5fe67b596

Aliases

arxiv: 1909.00229 · arxiv_version: 1909.00229v2 · doi: 10.48550/arxiv.1909.00229 · pith_short_12: 2GTTGRIAJLE2 · pith_short_16: 2GTTGRIAJLE2R7CB · pith_short_8: 2GTTGRIA

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/2GTTGRIAJLE2R7CBIROS2TVVTR \
  | 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: d1a73345004ac9a8fc41445d2d4eb59c6be3b37a0b856039e3c69cd5fe67b596

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3400e6856b928c035e582b1a2868ba96efa9be231d1cb73f35a61d8b834fd438",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-08-31T15:39:12Z",
    "title_canon_sha256": "1110198c3b013a995d4cffafb641588c83f38cda0dce04eb1b39f388a46a9510"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.00229",
    "kind": "arxiv",
    "version": 2
  }
}