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.

“Ich kann die App nicht einmal benutzen??”

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)

dca3074db873acbed013263f51a1820c951111f2b595c920dd66e5b7d8feec14

Signature (Ed25519, base64)

8TSfcIkBkdzbc6DJF5bkY7E450X8+Pdj/e2jzs5O+R3cfs9hBD/E65CRXNrKm5dpSmBCbKBSMZ9lVfK9El5LDA==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["dca536ea9831b89fd5538ec0e05cb81b43ee2c3caebe55cf21b346112d058164","76b1effd9a4e2e97957ae8210829b8040ca1b3f20c2f4d63251630ae8dc217f3","eaefebaecd97ec61cf00a4ff4a2c7ba9eed72855e3ef29ffe807eff469493fa8","e4f410f391f70e0fff46b01171bd925e10f7addae1d59349f6c0b64dc24ac992","81991aa47ff8d7628f08b1add390e20292c1b333ca563096395bb92346dc2709","c5a40f5d9682b45da350b1c03caad66ef0509fc66df57e40cf71add69263479a","14d76649907c8cc8c4780df65e770225adb82252765ee16025acd6c838be8f2a","d1554ac6f258baaf4d7640718abbad25070cb560653264d8eedf0dd70cc84ba5","8b8a91fcf39a99dd64a6fd8a058d9fcf6c26fee0668fcc424b09a74990aa0037","ed88d4e3a89ecaa852e7b20a1ee7f3a296bd3e57081ecddc2cd840a518ab70a2","85c3fbe89997c93f50bc23fa818bbf4bd3e224f003552f75980ca4b7480f0346","d28ed21d4373cfe7811429a5d4926ac987665261fca2846c93ddc2c90e391266","f95e3a68f572f5650a4093453e2bf28168547fa91a01ce08e539b3d7016a3f80","53a8a23597d45564e495678bf6125e41ef42f347693c924494330dab53ea1e2d","2a462314156907e42d6f0d96eed96123f1d79516aef73ed189d9f5466556b638"]

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":"de","page":"theme:vaia/ordering/de","quote":"Ich kann die App nicht einmal benutzen??","rating":1,"review_date":"2026-08-26","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.