Pith Number

pith:WDZFEDSR

pith:2015:WDZFEDSRW65NLPFQTMKQUXK3X2

not attested not anchored not stored refs pending

Frequency comparison of ${}^{171}$Yb${}^+$ ion optical clocks at PTB and NPL via GPS PPP

A. Wallin, B. Lipphardt, Chr. Tamm, E. Peik, H. S. Margolis, J. Leute, J. M. Jones, M. Merimaa, N. Huntemann, P. B. R. Nisbet-Jones, P. B. Whibberley, P. Gill, R. M. Godun, S. A. King

arxiv:1507.04754 v1 · 2015-07-15 · physics.atom-ph · physics.ins-det

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WDZFEDSRW65NLPFQTMKQUXK3X2}

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	2026-05-18T01:36:42.911359Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0f2520e51b7bad5bcb09b150a5d5bbe8f195902aa582cb71565d84ae4831011

Aliases

arxiv: 1507.04754 · arxiv_version: 1507.04754v1 · doi: 10.48550/arxiv.1507.04754 · pith_short_12: WDZFEDSRW65N · pith_short_16: WDZFEDSRW65NLPFQ · pith_short_8: WDZFEDSR

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/WDZFEDSRW65NLPFQTMKQUXK3X2 \
  | 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: b0f2520e51b7bad5bcb09b150a5d5bbe8f195902aa582cb71565d84ae4831011

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20fa302382d98a2b4ffdaa021a2f8d4d44fd6a15d36cc6525897fa8e6db42d55",
    "cross_cats_sorted": [
      "physics.ins-det"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2015-07-15T18:24:31Z",
    "title_canon_sha256": "d169d0adb364a5dfbf8ca5d3318af2bf6609166eadead839118cd17abedc5f76"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.04754",
    "kind": "arxiv",
    "version": 1
  }
}