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've contacted support 3 times; they reply, but nothing ever happens.”
Google Play · 1/5 · 2026-06-18

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): 53a13af4df1e937fc3d924d03fdf0e25730b7cff2665d57f01c3ac508c3f6f33
Signature (Ed25519, base64): DTNEObi+lCnckz3HP/bbYdTiKlWSX33kJP6h9jge6ted8gr9K2aMOLHtXoPhfXXGQsSKhdTwl5eSsz9Ba6S5Cw==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["539fcf9e66d4bf31e73f85da55a119bd27140379997a3eb62b9c7329b127e7ee","7339f3e25ae64e3ad481c67e879a38ed37b86daa96a2343acb1314593247ca52","92a90a76d40b6c4cd1bb946045f3db4c3dbd3232e15e11e0a3bc162580be130e","380cb654bd370a65288262d7461cccaef59639a80f7562cb3b5a5ca3ebb81449","a345ef6a97aba516dd416d270cd0ef1ccd9c63296b8e01d95621efd17f11861e","8386418096fd48e19794dc176a98c1bb2188c5640beead3bb13f9efacd94f79e","b429d6a6b4bab07cbd3f036556878f796b6feee74acb24658eb1e1e082c079b9","0e6352e2e7f1e5e0ee847a6a66bc09576b48276740f07a80feb858e8b1147a04","d1fbaa7a96bbe87e3ce35325d163aedf8b475f641bc9675f1a750a585af4cfe5","36b43838d83532d6dd22c9128224527797507b9d3f8aa286d95efafbc0b0e80d","b30b5bd263d48586ebd97cf3cd7e0d28b99e3f55621cd3d4efb024958f812b61","44c08976ee58b5cb058f11ca9229b8780c4a6cf8c64bbcf43373011c4a37225b","ac995c9ae640659c6b258d62d0cad1933912ca122fd33d27f90560dfd3199a84","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/service/en","quote":"I've contacted support 3 times; they reply, but nothing ever happens.","rating":1,"review_date":"2026-06-18","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.