Pith Number

pith:3752CZQQ

pith:2019:3752CZQQNE4V6KJDXNR4G3T3E2

not attested not anchored not stored refs pending

Discovery of the first Earth-sized planets orbiting a star other than our Sun in the Kepler-20 system

2) ( (1) Center for Astrophysics | Harvard, (2) CVS Health, Francois Fressin (1, Guillermo Torres (1), Smithsonian, USA, USA)

arxiv:1905.04309 v1 · 2019-05-10 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3752CZQQNE4V6KJDXNR4G3T3E2}

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	2026-05-17T23:46:25.350904Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dffba1661069395f2923bb63c36e7b269ca0928610b2e8b24a581ae6492ae3ff

Aliases

arxiv: 1905.04309 · arxiv_version: 1905.04309v1 · doi: 10.48550/arxiv.1905.04309 · pith_short_12: 3752CZQQNE4V · pith_short_16: 3752CZQQNE4V6KJD · pith_short_8: 3752CZQQ

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/3752CZQQNE4V6KJDXNR4G3T3E2 \
  | 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: dffba1661069395f2923bb63c36e7b269ca0928610b2e8b24a581ae6492ae3ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4928eebb55b3c94a785b37c6e6622fb76f70a74ee3e4732ea9e73cab73ae420a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-05-10T18:00:00Z",
    "title_canon_sha256": "8d4688a6920570f3c07fdab21fd02aa2dc12679004d2f39082a760ff0318b131"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.04309",
    "kind": "arxiv",
    "version": 1
  }
}