Pith Number

pith:JWM2SQDE

pith:2026:JWM2SQDE2WY7KL3RX4FAGCM44H

not attested not anchored not stored refs pending

Lessons from the Adoption and Deprecation of the Privacy Sandbox Web APIs

Patrick McDaniel, Paul Barford, Yohan Beugin

arxiv:2606.26390 v1 · 2026-06-24 · 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{JWM2SQDE2WY7KL3RX4FAGCM44H}

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	2026-06-26T00:15:39.065373Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d99a94064d5b1f52f71bf0a03099ce1d03671726cad28c769e35a5d9e33cc5d

Aliases

arxiv: 2606.26390 · arxiv_version: 2606.26390v1 · doi: 10.48550/arxiv.2606.26390 · pith_short_12: JWM2SQDE2WY7 · pith_short_16: JWM2SQDE2WY7KL3R · pith_short_8: JWM2SQDE

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/JWM2SQDE2WY7KL3RX4FAGCM44H \
  | 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: 4d99a94064d5b1f52f71bf0a03099ce1d03671726cad28c769e35a5d9e33cc5d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30ab9ac1d961ee067072a54c25ce8a0210aa9ea848ab2f9c6d2b7e58a89a8991",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-06-24T21:22:29Z",
    "title_canon_sha256": "83f973878d1e440164e7db8183aa7ca6fe336a114d0d9e890c56cb02888446a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.26390",
    "kind": "arxiv",
    "version": 1
  }
}