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.

“A fantastic and privacy-friendly calendar app”
Google Play · 5/5 · 2026-08-05

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 2543978942

Proof data

Record hash (SHA-256): 06f615f1610b09c8add94bddf7a01572474242e912ce7d302e72fd4aeddb10fa
Signature (Ed25519, base64): YlnIarYMm+tdFrpvPkXuEJJttWRSkyVQto03qm+GhYihDMYXkUpEDAOyUUG23JrwmTzlUsfSmH3485w6FOMIBg==
Merkle root: 3ea09355a1b22a15fffcd33ac0d37e4039cee2896092e637dd8c4e7dfb5d507a
Merkle path: ["06f66199d6f510d1ba1f72bd47d28873c0973f1b941d3eb903cf7abc500fabba","ee571efd0827e9ae61d6b73bf676cce2ddd7fb149f68931d703d98ec36c7778b","c97af36a432c1156f925b2f2bde18f4e7595b3c7ddbd6470adf688e8955d0a68","771b6730141af3ef06c487c0a5740b03783d1fd2cc8579e92d77c629d7157059","a175a787ab16f7bdca1a4a6601a3d08dc182e848c59e8ab3f0fd95f9a3d99da9","d66ec4dd6e7dffcb2dd7456eccfef7e0b4b91a8a639f8b33c257c6793ad44eaa","58db119dff0aa2ede9127309534677265fef093de26b9eb84eb9719a698d3c9f","8f3257db47ce6a4a26ec050a47ce8086b96624f5f0db9708b380bed021fd4907","d2e29be9d8373c23f9b503eefee026a0c8a6188110d73173c412891429ae128b","445ff0460e47cf91e80db928f13db6bbe44556bd454dce5f36d08fd1b8ecbad5","fea61a36542d4a2158014d1ed6ff898d9e095f955d86c737be9cae97c9468ae4","1d5c12a26bd5f3e912e34a6f20b7e6e188b9e1c8844527140789c47763eda015","cdf1574b5ad3d2b698b1a16a8e9aea647ec4ea1fe5581e45359580053346d889","c813a34665dab5ffae8513e10cc2fedc27edee77c70c636abfc3ac5275137875","331ffac0f34e1f76cacd782a04285f7bacef5f5dffbd1f8163703fce9b22280d"]
Anchored: 2026-08-21
Public log entry: search.sigstore.dev, log index 2543978942 · entry 108e9186e8c5677ac836…
Expected log hash: 69ff2d97383073bd392d75b79533a80cb25c69be55aee7dcb24b1acf4a379172 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":"v1787289230204","kind":"published-quote","locale":"en","page":"product:proton/proton-calendar/en","quote":"A fantastic and privacy-friendly calendar app","rating":5,"review_date":"2026-08-05","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=me.proton.android.calendar","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (3ea09355a1b2…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.