Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“Good email provider.”

Checks (re-run on this request)

• ✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
• ✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
• ✓ Public transparency log — Sigstore Rekor log index 3637399944

Proof data

Record hash (SHA-256)

03d69c61d18922aef45895cb8f913acf752e119795081764d7671226f877c359

Signature (Ed25519, base64)

tkgHdGoH9lhuvyleTJkiEP3HHEG/8QPGg9F9GXvdUhpvCZl6N+lJaCeOAK9G8K40BHHIiHt21U+PhJIQQ6fICw==

Merkle root

7dc417186ff758c181cdbe9905e2a9f7c2944eb88a41e7dbd52a48ac04321d3c

Merkle path

["03eb1caf42014fd99d1012ac5c27169130ecc0aa4e5a032bb05d2c59109d35b2","9e38b03714ab86bc77021934f98aff4c07c41a1968c595c17b02bea58bf0b47c","62e44e93517410b432d35049200e164834f0e92b16c8bf49b3eb15313e05996c","20497ae8b454c4c4f68145ac092fcd746d7b6a2f5d00789a9ca730f6b76c0f0f","cbdf6ad5d5fc6d675554bf47d2e002a4dfdb951dffd8350eaa993d2266453d8a","36eac69dd54ac2f9f9dc5b7170dfb12a7126b4759c32a78de96463ed9b53a241","e9c2b47c4b3ea515b420c69dff823e35e87f52ef094205cccade099ac3a15a55","0ce7f44e6d1b18b9e10c6a184e9eab5237c748c6b61da2a46055c2dc348b72f2","bbd1835f89d39cfd67dd7d854e48fff3cddaae5be09df918d5d131d990d3d796","c015003180ba5cb15302d669fc758ce30bfdaad21c37c05eaf61ddfb5e928eb7","416ac72626963bbb3122bf665109ec7d944d4d5c17f5d6ba77ad19d4c322fe84","c55a157ba05a1522cdf00c427814e744bb2583aace026375d741f884a6dc41ca","c2630b6b9ca1d11e16cb99a494743682b41d3604aa81f0e537e045d0ceb25c0e"]

Anchored

2026-11-02

Public log entry

search.sigstore.dev, log index 3637399944 · entry 108e9186e8c5677ab939…

Expected log hash

17b34089c9aa8091fa75e421b51f027dc37b50e8cb79082ca972af63c8cadbbe The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.

Canonical record

{"dataset_version":"v1793587696188","kind":"published-quote","locale":"en","page":"brand:proton","quote":"Good email provider.","rating":5,"review_date":"2026-08-12","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.protonmail.android","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (7dc417186ff7…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.