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.

“retaining important knowledge for longer”
Google Play · 5/5 · 2025-08-30

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 3199173952

Proof data

Record hash (SHA-256): 3a5235c8fe4447dbcfa7e1d0ab0cb9b2146b0cb008f9d79a56768a21ad646265
Signature (Ed25519, base64): Z3C28H2KSSHka2ZKB06X8lg2kCt7zGwOj5//a6fxYB+oSKFtHcwjhFZ3shaEBgSIVRaMVafBQDeaCbsjmLEUBA==
Merkle root: ffbc979c8901fdf55f43c5151768b18a738fc1c271c9b2dc97349c3fa8ed35d2
Merkle path: ["3a573d5285a99d736e9d2df4fe600784dd443eeb9d3ad68826c41d062e69910e","dc0ae09bc24fe60a9edb5cac7b02d3e94303e5a46cff911793f028b67079a9d6","1f2f6ec5ca8dfccf6290d7e0a6052bd10c1ef3bf8fa7253d95d10eee0a763fb7","30408214ec2746c978c5b6ce17432c622779b155c021e9abd9cc36231663bb04","e05ff8c02e12be6d9d807de8f18dbba0d5f7c0b82d1bfad1a2135b77dae38eae","3ca8e90f4e11a536cb7ce5cc0ef5e8fe2e6293a96667cc98cd705a16cb9e9c7b","4d78c370abb37a859891506fa694d527a2315858720d91acc4c420474159b89b","0123c2a66b2d08c868c496fce41c80bf5a757c9401d233b36048786753f70f2f","689539d22f23d35537a1d34480def89c2daa9f401d7a55c8cc36b226b55eabe0","9e0e5cedc5103a859e068873c578f091de27b49033cb7ce2b08b7c425b60c7bc","8f7e44f63df1c81224df91ae9dd234c6f769daaabc106b597f32f01f2ca84605","7db894157ed9dabb03cb2365fb7f1c3175f5c464a5f6fd3024b83b95573cd6d5","81757bca5afdb109f23b2b1ab2e08f434f626af25e986d2585973e2409a82e36","2f35432083547a52411b4b8128ab118601abc6a6e158a38894add0923255dc0e"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3199173952 · entry 108e9186e8c5677a85d2…
Expected log hash: 3bc66074c7b0a853326bf5ba0590a111eee6455dac5c98c791c22eeea9a48920 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":"v1791689192448","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"retaining important knowledge for longer","rating":5,"review_date":"2025-08-30","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 (ffbc979c8901…), 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.