Pith Number

pith:2YUTTHL2

pith:2026:2YUTTHL23272GJKPY2PEYBHJD7

not attested not anchored not stored refs pending

Limits on global cosmic birefringence using radio sources

Ian Browne, Neal Jackson, Richard A. Battye

arxiv:2607.02664 v1 · 2026-07-02 · astro-ph.CO · hep-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{2YUTTHL23272GJKPY2PEYBHJD7}

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	2026-07-07T00:16:06.606838Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d629399d7adebfa3254fc69e4c04e91fd661067761456d3a776692361078cbe0

Aliases

arxiv: 2607.02664 · arxiv_version: 2607.02664v1 · doi: 10.48550/arxiv.2607.02664 · pith_short_12: 2YUTTHL23272 · pith_short_16: 2YUTTHL23272GJKP · pith_short_8: 2YUTTHL2

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/2YUTTHL23272GJKPY2PEYBHJD7 \
  | 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: d629399d7adebfa3254fc69e4c04e91fd661067761456d3a776692361078cbe0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c98f1335a19be99eec0a1f452cee28486d2c679b5f96f6141aed5e64ce9808a5",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2026-07-02T18:00:08Z",
    "title_canon_sha256": "75c5f93454e9397e6c97177bc64db0837a68b71d9597d5307066ad143b6ba478"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.02664",
    "kind": "arxiv",
    "version": 1
  }
}