Pith Number

pith:MMZROUEJ

pith:2014:MMZROUEJHWYRPC67NPLK67RZ46

not attested not anchored not stored refs pending

Systematic evaluation of an atomic clock at 2e-18 total uncertainty

B.J. Bloom, G.E. Marti, G.F. Strouse, J. Ye, M.D. Barrett, M.S. Safronova, R.B. Hutson, R.L. McNally, S.L. Campbell, T.L. Nicholson, W.L. Tew, W. Zhang

arxiv:1412.8261 v2 · 2014-12-29 · physics.atom-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MMZROUEJHWYRPC67NPLK67RZ46}

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	2026-05-18T02:16:20.441612Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

63331750893db1178bdf6bd6af7e39e785f13d4a877bedc9dadcb31cf818ce5c

Aliases

arxiv: 1412.8261 · arxiv_version: 1412.8261v2 · doi: 10.48550/arxiv.1412.8261 · pith_short_12: MMZROUEJHWYR · pith_short_16: MMZROUEJHWYRPC67 · pith_short_8: MMZROUEJ

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/MMZROUEJHWYRPC67NPLK67RZ46 \
  | 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: 63331750893db1178bdf6bd6af7e39e785f13d4a877bedc9dadcb31cf818ce5c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "669a5d0a62900b7af89393d6d6b3599047daabcee753bed8268811c055b4f497",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2014-12-29T05:16:51Z",
    "title_canon_sha256": "b01f5b2eeb9cae2bc66a8253d3038b4de09364c228c27bdb83f249673cd44f85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.8261",
    "kind": "arxiv",
    "version": 2
  }
}