Pith Number

pith:OTAPCCLK

pith:2011:OTAPCCLKONAROEFDFRAS24GQWS

not attested not anchored not stored refs pending

New constraint on cosmological variation of the proton-to-electron mass ratio from Q0528-250

John K. Webb, Julian A. King, Michael T. Murphy, Wim Ubachs

arxiv:1106.5786 v1 · 2011-06-28 · astro-ph.CO · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OTAPCCLKONAROEFDFRAS24GQWS}

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	2026-05-18T02:01:27.322991Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74c0f1096a73411710a32c412d70d0b49c96adb47d9cfedf4754108ae86450c6

Aliases

arxiv: 1106.5786 · arxiv_version: 1106.5786v1 · doi: 10.48550/arxiv.1106.5786 · pith_short_12: OTAPCCLKONAR · pith_short_16: OTAPCCLKONAROEFD · pith_short_8: OTAPCCLK

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/OTAPCCLKONAROEFDFRAS24GQWS \
  | 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: 74c0f1096a73411710a32c412d70d0b49c96adb47d9cfedf4754108ae86450c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4082be7432eafd4516ecbdcaad3b60d53af85565a1f3fcf9a123d74a936bfc9b",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-06-28T20:00:01Z",
    "title_canon_sha256": "316b4b2f5ffe0367b1c4169ebaaa26a3f546bed6eb0850ddc6579efd974546d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.5786",
    "kind": "arxiv",
    "version": 1
  }
}