Pith Number

pith:42KTVHQ3

pith:2015:42KTVHQ3TTEBGZDG25BYBZVJQ4

not attested not anchored not stored refs pending

Space-Time Reference with an Optical Link

Joseph M. Kahn, Leo Hollberg, Michael Taylor, Paul Berceau

arxiv:1512.01912 v1 · 2015-12-07 · astro-ph.IM · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{42KTVHQ3TTEBGZDG25BYBZVJQ4}

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	2026-05-18T01:12:30.341241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6953a9e1b9cc8136466d74380e6a98738c7bf58e990ee015d99b11d5475853c

Aliases

arxiv: 1512.01912 · arxiv_version: 1512.01912v1 · doi: 10.48550/arxiv.1512.01912 · pith_short_12: 42KTVHQ3TTEB · pith_short_16: 42KTVHQ3TTEBGZDG · pith_short_8: 42KTVHQ3

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/42KTVHQ3TTEBGZDG25BYBZVJQ4 \
  | 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: e6953a9e1b9cc8136466d74380e6a98738c7bf58e990ee015d99b11d5475853c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62c145abbb4374dc78c0783bfa800e2f550979be0d386ab87e5ad846fd6f5c34",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2015-12-07T05:08:40Z",
    "title_canon_sha256": "2b9975bde5b9f25a60c5b13af9c0adeaa80c6b8fd95527b6f4fcb4c742b15628"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.01912",
    "kind": "arxiv",
    "version": 1
  }
}