Pith Number

pith:ZIWWY3NA

pith:2019:ZIWWY3NAYNGG6RZFODFD72HCSS

not attested not anchored not stored refs pending

A survey of C2H, HCN, and C18O in protoplanetary disks

Chunhua Qi, Edwin A. Bergin, Jamila Pegues, Jennifer B. Bergner, Karin I. Oberg, Ryan A. Loomis

arxiv:1904.09315 v1 · 2019-04-19 · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZIWWY3NAYNGG6RZFODFD72HCSS}

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	2026-05-17T23:46:52.391496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca2d6c6da0c34c6f472570ca3fe8e29489be5c5c6bacd75eef8cf37ffd890440

Aliases

arxiv: 1904.09315 · arxiv_version: 1904.09315v1 · doi: 10.48550/arxiv.1904.09315 · pith_short_12: ZIWWY3NAYNGG · pith_short_16: ZIWWY3NAYNGG6RZF · pith_short_8: ZIWWY3NA

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/ZIWWY3NAYNGG6RZFODFD72HCSS \
  | 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: ca2d6c6da0c34c6f472570ca3fe8e29489be5c5c6bacd75eef8cf37ffd890440

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c2a9b6abb2b615afc520bb2a940c6df9ddc8574c38012196f9a5b4a11507cf09",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-04-19T18:55:59Z",
    "title_canon_sha256": "7d48bad1fa3e968bfd2d7f69083ccad30639bb1a66a7b1eb604dc2078f12b427"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.09315",
    "kind": "arxiv",
    "version": 1
  }
}