Pith Number

pith:R5R2KM4I

pith:2015:R5R2KM4IJSNZ2NY2B6QAR3CHE4

not attested not anchored not stored refs pending

Taking the Universe's Temperature with Spectral Distortions of the Cosmic Microwave Background

David N. Spergel, Emmanuel Schaan, J. Colin Hill, Jens Chluba, Nick Battaglia, Simone Ferraro

arxiv:1507.01583 v3 · 2015-07-06 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R5R2KM4IJSNZ2NY2B6QAR3CHE4}

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	2026-05-18T01:22:01.323715Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f63a533884c9b9d371a0fa008ec472725236c94dd3f50e8c7cd0dc26bde6cf4

Aliases

arxiv: 1507.01583 · arxiv_version: 1507.01583v3 · doi: 10.48550/arxiv.1507.01583 · pith_short_12: R5R2KM4IJSNZ · pith_short_16: R5R2KM4IJSNZ2NY2 · pith_short_8: R5R2KM4I

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/R5R2KM4IJSNZ2NY2B6QAR3CHE4 \
  | 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: 8f63a533884c9b9d371a0fa008ec472725236c94dd3f50e8c7cd0dc26bde6cf4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d84b8d1c00762368b0e1be77f26159722c9357646a3354051c18bd84a23b9423",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-07-06T19:59:05Z",
    "title_canon_sha256": "220478fdb8a9ad851873910a570eb1de8424d2cc7004c9d3e8e8abb14a389930"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.01583",
    "kind": "arxiv",
    "version": 3
  }
}