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 just downloaded the app.”
Google Play · 5/5 · 2026-03-29

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): 391c1dafe87ff5468350cf37b4971c665898a74db2d3d1c4fa031eb9feee4621
Signature (Ed25519, base64): QHcj2wakBUEwKFntyesdfuyDSSkAq4FUg8hXZWDIakc9LspLthnpXEWhUlDJWzFn5tXhgCK4YmYfxkvhqSWJDA==
Merkle root: 954962254ff2eae9503796c02bd08deefa3a5722e4ac0b3981007e2b9ddd84c7
Merkle path: ["3926fd40852dbd239341443b896f2040adf50fc7e2ae15592ec97c424a50a1e7","f724daf20b31f0b68517b3d3550c2882b59372c4dd69eba8a8c1ed56f42583b9","07130f6166de368e09486b11362762093bfbbb65e98a9c855b2def19dbf4d7f1","128ba8c0362402df8498a61afd430e22209dc17b1594655cdba7d7d118b11769","eb949c034680a1eb69b033fc8e09e287b640443ceb4339c272e39100d21ecc17","a3ec2aeb17a74270548a0675897b7295c0d8d3c4fa96d1478a6835607a1e4124","4a7524915257f6c5cdd6ec1b5144abf899c0a8095e6fb385337d59c67e804688","061a2e6bae25220f686f159f431fd5e6f1077f5dae7723d1c630fff26bbdecfb","092f448b16f6f3cff7b71974237aff55b9608ce843be1f952c995f59b00ae6a4","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 just downloaded the app.","rating":5,"review_date":"2026-03-29","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.