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.

“Sometimes needs rephrasing for more relevant questions.”

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 2904877428

Proof data

Record hash (SHA-256)

19d4b0f61ed00fe79d5a9b34641cffc4a2db5c31e5698c0fc9e53bb4a56fb499

Signature (Ed25519, base64)

w44iFOlJWhYexj/VhYYwC18sz7N3+7YT3fRlRhHmUdFMRRIO4gQgtS8xJ0mAFRbR/B6e2fBpXlZkAlfMJNKXCQ==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["19d68f3bfeba1170c1698593d5007fde70814949c65dff556c323279857f34ab","60ac9b559877c9d730d2751049c75073687cf0f7ad833e19f2c5e5627439723a","45ae1cca68c3a80f90b3a74d499166d7352cfd8ef0bb51b491639ba824b1ae35","811cdcc7d9c1e3ff3797ca94ad495d4e105783d591e289b97e784e0d694da441","d6ff3057f3edf76950e50f5cbe879be8d1b0da804d1decdaecc89ae720cd6142","c26f65fa8a5bb769a4583ef63d395ed7406ac5e1a09b3c75ce6860fa2756fddc","74522697798c92c4c26acd866eec25bbd4f96fb4dfc48399ada994ddc630220d","e182f774d41fbb61df42aa36038aa15644e16ff95b75aba6b46a98a87817b4eb","fed4fc83d00c72d2f51d192a942793cd55b39978c317ba0725fb46dd5332b455","5e19ab54ca8adac336c09bc9e25cb1f486e85d1bedc29c4c4d278fd509c1b824","07be6c3c8a9e01f9b22a73457cdae6cb1c800fed0aa42a077db2612d9d0e21be","31f91261e54510c82e0f505e928dcd01951b5f1b3bd1a4ebc39a5ed954368324","e3c57a8cebd6c96ff44fe2cffa20a59e203e20975780cfe446c93ca7bbe448ac","2e838893ef313b8ef0f87568e1e691fc197dfcee84413640a12968493decac73","bce5d442c07de6307e5ea8947098e74ce88c2246eda5e5fc1015a6d7519228a8"]

Anchored

2026-09-21

Public log entry

search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…

Expected log hash

d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"en","page":"theme:vaia/communication/en","quote":"Sometimes needs rephrasing for more relevant questions.","rating":4,"review_date":"2026-08-15","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (e299bf38720a…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.