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.

“Bon fournisseur d'e-mail.”
Google Play · 5/5 · 2026-08-12

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 2543266411

Proof data

Record hash (SHA-256): 31f6051aa0c020fc61bfb2199dab0f7cb2427cf8ec9a4ba89bb43e617c0db4f8
Signature (Ed25519, base64): K97nvWfIx7GrMsUWI5gThgh/D1iaLbs+EtIjpx+Dh7G8zV3lvuVNwFld4hahVS5PBx3+3hYB7j9v0WVaznhUBA==
Merkle root: 8ffad6e97d1457610bec7a891f189d1ba7dd7a92ca672c69ff1ce3283acb4b5c
Merkle path: ["31f5ba0ddb6a783273b3a1326dcdbdde0013b02efbb2f345d979fd48875a2bc1","6ef8a38418267e43b7d29ea820c1a38e66eaff1f6ec184e1db8ff56918504ac8","6f0ebaf2552168fa0e608bc83971ff643e5c21538f8290d2276c996ef8537825","be8f6b9f82ad3564b954847d9dac5c0fc12e5cd7e6818a7339ba915a4e6e5e7c","0cd1becabf65e11d33906b832d215a03a7bbc2cf7866a81240511e2000b82ab6","d6c9ce7ee08df1799a42d95402b690164e22feb692a7fbfab98895af5f090f30","ae89300e2581ef2e1cfeea8063f07eddc2d9381d979b189e87764909e40aa65f","1da3856d742af36d9b6afb042a5a2084e5c50ebc9f309375903ea06ff527c59c","cc931d3add07f19eb5e7860fe0138f54fc3fad650d890bc014c059048f05d3ff","4ef6d4c830a003fa3d675fb5f10db6d05d06997b3ec40206c17496e79c32c85a","7cf608fdcf7f2bf612f74db8f4447b05647af97c12ae3704b0b1f0b6ebfcdd94","802f0036af5e2600f08e1b83e01ed5dacd11efeda6df4562a01b59cb89fe34c3","fc2731d864612e3e44a82c332896cd2770948167888770abd053f05a4950b01b","c3da944168348f2737a3a033a43606f7965e05f20058b59547dacbfe770ef5ce","e9f7ba9964da1314f660fb2f84a68d574ffe9983879b5b54001a09ca5cb5f33e"]
Anchored: 2026-08-21
Public log entry: search.sigstore.dev, log index 2543266411 · entry 108e9186e8c5677a241f…
Expected log hash: 443ef8f29d5167ebb4c56a46778facd07b7651afa8db2d089c14a991ce0d04db 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":"v1787284817344","kind":"published-quote","locale":"fr","page":"product:proton/proton-mail/fr","quote":"Bon fournisseur d'e-mail.","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

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 (8ffad6e97d14…), 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.