Pith Number

pith:Q2BRI5OB

pith:2019:Q2BRI5OBHR25D4C5TQBYNBIJIY

not attested not anchored not stored refs pending

Towards Machine-assisted Meta-Studies: The Hubble Constant

Daisuke Kawata, Pontus Stenetorp, Rupert A. C. Croft, Sebastian Riedel, Thomas D. Kitching, Tom Crossland

arxiv:1902.00027 v2 · 2019-01-31 · astro-ph.IM · 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{Q2BRI5OBHR25D4C5TQBYNBIJIY}

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	2026-07-05T00:30:56.777812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86831475c13c75d1f05d9c03868509463dc51c9c1107ab000029d3857e69d960

Aliases

arxiv: 1902.00027 · arxiv_version: 1902.00027v2 · doi: 10.48550/arxiv.1902.00027 · pith_short_12: Q2BRI5OBHR25 · pith_short_16: Q2BRI5OBHR25D4C5 · pith_short_8: Q2BRI5OB

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/Q2BRI5OBHR25D4C5TQBYNBIJIY \
  | 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: 86831475c13c75d1f05d9c03868509463dc51c9c1107ab000029d3857e69d960

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9de0999dfb506e45acae0644faf03a697fe6fd54e78b31ed092d87b3909e125a",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-01-31T19:00:07Z",
    "title_canon_sha256": "f7dc3bf8185c2605a34e9d029611e0d08b40c7e612a396af3971445b7e14f85b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.00027",
    "kind": "arxiv",
    "version": 2
  }
}