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.

“Es hilft dabei, sich in kurzer Zeit auf Prüfungen vorzubereiten.”
Google Play · 5/5 · 2026-07-14

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 3199014646

Proof data

Record hash (SHA-256): 27cdf8f500efc99ccc7ee7dc9cf41c8d38886f34084514ea5d0888f809dae8d1
Signature (Ed25519, base64): Fpsr5+FiXGJie4EsLqHhdOI57kEFJSE3zQZKmW2XhcuFD5WDkKUpJ9CqFd/D5Qe+shBv4MzfYX+LSoN5IieJBQ==
Merkle root: 79268b3be1e951447ad916daa23d94d3a225505999279adfec84e5728be030d6
Merkle path: ["27cf6506a682be9bba242e3256aab5af4fd01b5996205b800d5ca7c2e71b96d1","29ae2bfc7a797ebd18d638d118ecd8aeb07aa7fb64f20e13b122990b6256769f","21a80f15d51e7f3fb246c9b64771b17687d1baca98cfba6ce2e3e69dcf65971f","250bb7ddf79de4c6b9694d03b30dcc2f1741553331170c9f23bb07800794ff4b","7dad54ae9cc04d0b08da2aee7d9921ff73c387395890ce88fd8ccfbb93bd2880","6d018d7a643dc01e2f4f0b983c81275b13b744b071c2b93a40c98fa4e7df6555","ac11eb3fa3eebd1008ad386b11c7bdbcf7cb117611e31ee14dda5abe64d3648b","69e09d0b5753beb84819f9f5e1be5f4eb2b60f3448354f32c44ab4b3a23244d7","17c093756a540cfa25412baa3c1c5853b3fdcda860c0129c4e2082593fd687fc","4595cd41d020b459c7032b48c73b102d4a0bae807870909b5e85d6b1c34096a4","5a1e1b396c4abc5f483318c0b890917f1ead6301ec76c4fabaf6c23b0d600b19","74ec616be75d7ddfa42f796ae5ee64734ee2aef3c18f854d94e8278d3c2de665","ca0926b42bcdad354c17320adc5661c1a0407072f1d5c01424cc2e7f9a3515fd","b8e0a41590cdecf5ee846d5a4dcd3ae91c8a0a052b75fffe7c4c5f4e2ca53884"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3199014646 · entry 108e9186e8c5677a77ce…
Expected log hash: 55430b734e4d00e4ba9c340c7ab064436f91281dd4cbc27c1ffc37d3e26a0e3e 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":"v1791688566698","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Es hilft dabei, sich in kurzer Zeit auf Prüfungen vorzubereiten.","rating":5,"review_date":"2026-07-14","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 (79268b3be1e9…), 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.