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.

“How am I supposed to learn if I have to double-check every question?”
Google Play · 1/5 · 2026-06-28

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): 774f4f8617bb3d050249643691eee8809aa0b4050c19f6dc1fbc0dc1c45b0c31
Signature (Ed25519, base64): umXl54kAGK+XfqpixzmpQHUSjy6dD+AolosH/FAMr6ccCMLFrAYOKQFNGP0NP9Mb9TSyWkPP282oSBdjrhN6AA==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["77525963fe2dd082d98d7cd9845fba9379e97ec91addd504d8086b2e834c50f1","724ba09bc04bdf58bf75ad9403e0d51ed75c790a220bd4e98d085defa82b0a78","8f5e7b93a6b1ac705e4b395841e836cdfd145aab16eaf6878310b4c9e6f4c248","c9bca2eb2815689677fa61eb43e627f3b58070169292924f9eae41a19533c6a0","fbed4f8e4e8f56012e2817676aa470cecc9ed76f637dc865896f84d27741c811","1bee9efd413a1e69f3c3a9f6de08d2fb8fd6dff2f72e0734d621a7b39c4f4248","d8f132047081c7b2b452e026172f119b2d78addb79ea302b6f4fde48a2560140","f870e199f98a3d52ad6f24efa85732725e2573a900a93b76851c5bf3954daa87","2f27fb12fcec9d587e1c2909e71bc6d0e3de67517bf0c9b8da91df4be02d6633","339e9c7e5cfe79d94f03e02a3ed2b23c0fa30bb8507ac0bf87c58ee3cc943b98","9db404732a39eb43edeacc7dc2dbb2572a6988edc1ff946ef933a8584aa70600","f1529d9d8d0b27350c2152458e297d9406b31a0ee9c50579b35f35e84480df87","3fdd31064998e61048d534909957bf68a4f9bbe35571f6d185756d8acc2a5420","aa4bbeb87247c2797626ab02a549451da6dfce4dcb854a36fdcc601e3e788772","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/fit/en","quote":"How am I supposed to learn if I have to double-check every question?","rating":1,"review_date":"2026-06-28","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 (e299bf38720a…), 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.