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.

“I wrote an email and a helpful response was soon sent.”

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 2681318538

Proof data

Record hash (SHA-256)

09fce412c6003a41450fb51fc6f7f64da17c56731f7e3aa61a6695285e4fbd97

Signature (Ed25519, base64)

Ys53ZMxl15vrP2+xlNh2RO7Vdu+bIsZzgAL4Tz/jsfecNvGTRKqPHFRJKjJGlmKN9SywmjKyMj3ghaigt9vfDA==

Merkle root

80545feed588a969110bcd2c8e526c8c2e400cad7348c7872c323a1674d2355a

Merkle path

["09fdec228d327c408af79c1a0bd8e246e6c9ebba97761d8f29236c88034d9171","61e0433a5b61b62885085e01eec398ac0d3f71d652ab5d447596432c55433bd1","8bbd8abb617318a1b282ac09027a9c5bb82a3040a327d8ef1b785cbb8a895c40","90263733f313df668c700ced17a12fad0984f3724aa06e333803f6436dd1dd80","1a31219c3864f4fb77c0b58bbbc9d44188bebfbf1361a3fde069ebf646baf4d8","ff5ea8090352958f7d7f475477504e8c5b31a847b624e1b26a7ad5a7b8110c22","de4f596369ceae052ed530eb0c057ad7026bca35dcc665ade480ac867da7a37c","a2c769f1bcffa30063c74fc88c77bc0b5e3f948686d7cf5182a3d06a6fba7c4f","d3bc725d30c6428729ca689c227e6e9ab81b1e115b094e636bc8a2e12db4c3cf","e56085001975f3a6f907c5086df8319f97e2bd06a4834c0e63a38daf3da97668","b79e21263f593cde011e300a3ed53cf16be958a63ebbaa6590901198f98bec16","0ca1719d1668d120a6fce323cc79e9d42ad7abb5c9a5dac5c512164c0396f635","cf85b24fc1eda5aee2e6660fb94d01e1afb915d56f864de60a3987cc95b2cea1","8378d9d6ade0d6214a847a4a8145a9f89a0810e29d8d29962807c9aaac17e271","fca9ab6e6247b2eeb89a8619f295121cacecd7391ef0e06251791813430b969a"]

Anchored

2026-09-01

Public log entry

search.sigstore.dev, log index 2681318538 · entry 108e9186e8c5677a4bab…

Expected log hash

663cb0c78a61cc964eb6f0e00407fec6844129fb0623d2ac072b7b2e4274054b 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":"v1788302168109","kind":"published-quote","locale":"de","page":"product:proton/proton-mail/de","quote":"I wrote an email and a helpful response was soon sent.","rating":5,"review_date":"2026-08-11","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 (80545feed588…), 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.