Pith Number

pith:QVJP4XOO

pith:2025:QVJP4XOO4UYMM32OKQRXQR5OTM

not attested not anchored not stored refs pending

Emission Impossible: privacy-preserving carbon emissions claims

Anil Madhavapeddy, Jessica Man, Martin Kleppmann, Patrick Ferris, Sadiq Jaffer

arxiv:2506.16347 v1 · 2025-06-19 · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QVJP4XOO4UYMM32OKQRXQR5OTM}

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	2026-07-05T12:05:43.289414Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8552fe5dcee530c66f4e54237847ae9b1df5090e07f5a3f465e8d3bbdc09c4ee

Aliases

arxiv: 2506.16347 · arxiv_version: 2506.16347v1 · doi: 10.48550/arxiv.2506.16347 · pith_short_12: QVJP4XOO4UYM · pith_short_16: QVJP4XOO4UYMM32O · pith_short_8: QVJP4XOO

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/QVJP4XOO4UYMM32OKQRXQR5OTM \
  | 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: 8552fe5dcee530c66f4e54237847ae9b1df5090e07f5a3f465e8d3bbdc09c4ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd3933617f9a0a0b24d4a0511eeacef6f73a3b878e594075f839de5ebc2f7567",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2025-06-19T14:23:48Z",
    "title_canon_sha256": "4dc4a243369b8e9b14fbe672f26b8cd83e0b7f72e465dc3ce58e59c7fe98fb5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.16347",
    "kind": "arxiv",
    "version": 1
  }
}