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.

“Eine Spracherkennung, damit man nicht immer alles schreiben muss, wäre toll”

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)

62dc6195c5ad73ed8f31514223d7ea5ba55e8a17760f2f34fd6c2a7124110cc4

Signature (Ed25519, base64)

uWtuuMF/ZwlCgKvZYi2RB/adNf0zsG7ojV5r2/Hk8U7QYpaneHkoxqz0AAkp0fRi3HqsUmRCcTvecUXmj57DDA==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["62da431f94f25fea36fab23f702b43f96b764c6d692a1809920abcfa186cfd81","468844d9269779dc71909213d17f5f35557664dfcf3d8a44de20b30b13fc34cc","e0146b58a95829e5caf58db87c9e66102dd4770a75080131bff60e894d985789","d10934ed2cb37e7c92298f3699289fe1fb22781c9d1dcc60ff884526334d77b4","6ed3df3c1ac5c39914078382b4df4869760fd04def472a1ab497dd45c72a0ab1","064fbec9ed3b636082b6d02bad32ef3dd9c99ca16e60185696db248c80ed7dfa","222ad2a8c56d9b82a8043e7abb73583ea4e8d391fab8cb1cdcee4f4f854d32a8","b23091a4effe76a9639ff59e3e6c29f26ea7feb23a471e412f8f2196fc61c4bc","a209b22a20a3e6fcbc21220883267285f88db93145bb13520a5ffe5cef5d8007","b46cdd3eb502ea8d701c296271c408a8575a2b16828af47f917816215f47d9c5","17971a4c5f04b7879efb1439cdb9cfeb95d5979aa2126db67295ad88a283fb0b","f66e3f0908cccdfd396cb0e5dcc96f2570e4fe1056c45eec7a7025dce074a563","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":"de","page":"theme:vaia/communication/de","quote":"Eine Spracherkennung, damit man nicht immer alles schreiben muss, wäre toll","rating":4,"review_date":"2026-02-07","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.