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 have been using the app somewhat regularly for <3 years.”
Google Play · 5/5 · 2026-09-14

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 3239939960

Proof data

Record hash (SHA-256): 3d0dfdeddc67a1d942c72e31151a142651e02d7441a12b69bcc818104d621c8b
Signature (Ed25519, base64): ezCl0NxU6bfJOUtI7e3VyKUMGrBPHZLu+2Ya87ygcMlRfMIsgIKtuo+kWeRDTPYaZdM0y1Ysb7c/tPZfwbPYAQ==
Merkle root: 954962254ff2eae9503796c02bd08deefa3a5722e4ac0b3981007e2b9ddd84c7
Merkle path: ["3d0d3fab712a5c7d28b7e68ae7a119240e1259e8fbc946c7c18c97de02fb572a","c1ccfbdeff010db285a0c798aa32b6f80235cb28bcd21f166a7f90dc46378765","ab2203a516fb8260880eef0cc46363a9c4dad28f7e2e3f3bd5ac482e4ac4fc69","97081144d70575213b36abfc22eabdc7b7a01749b724dd9088b2165384652610","1dca2ef7085871f0e530fa8031597cd042776a340d473deaafe36cb1547b8415","e8827a47c6eb0b30650a09ffcec144983e3f9356bf320d34dc6a85ba351e5d09","cd261e885ce592c4352db5491c4268d65007ca2bbbc2174679e723da10db2d0c","e4470954d076a2cde9005f05f6d085b5d890d757cfcd77b43f37164bbd1c9121","856d3e0d6a5c510495d4b4ca714e167ade390a250476dcc393a117fe03b2711e","b0194aa255517e112e18c758c0037d78516ecc24d47db0378977d39389ae0e73","17f443e26f57ece4faf872e420d90fe0ca13987aaa28191f15ad8b704c244dc4","37d889bdc912bd16145284899ed1544c934e2d5178cc362b2ba799bdeaadde22","07b2ba787804bc9fbb84c73bed76b7f65ff1b8c1694261a8264cf5f3209f315a","e7bbbee54f729cc449b73bfdd383c96b7b180e618c270037b5697f1fcc75f254"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3239939960 · entry 108e9186e8c5677a0082…
Expected log hash: 28fd9464b857a07e61931e67235e692cb8af33d7541a60ca163756a54a64e9c2 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":"v1791859824762","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"I have been using the app somewhat regularly for <3 years.","rating":5,"review_date":"2026-09-14","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","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 (954962254ff2…), 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.