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.

“in dem Schriftfeld werden keine Buchstaben angezeigt”

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 3199173952

Proof data

Record hash (SHA-256)

4e7c6541ad0b717ee29e81614dd55c2c514637f7ef69c913116e6ff027bbce32

Signature (Ed25519, base64)

sFgPRwTy1AQRZ+JxLljiFTYKN6OPqlgAf3+ADRYr4o8kRUBwHjEuG5ooNkYBzBgc0VAj8h0Xz6bwMD3Vf/zVDg==

Merkle root

ffbc979c8901fdf55f43c5151768b18a738fc1c271c9b2dc97349c3fa8ed35d2

Merkle path

["4e7c9d2ae6045fb400a006dbc0e8acae9fdd8746ae6ea1f668a82ce80238828a","d7cdf2448d1f313b23c1eef7e84f8e73ae41b72dfc1f93a9a1e39bda30689240","2850b5a6e27c654b6d354392a765128d0ec8bf281483a0083c3b95bdf6486cfb","12ed17eca8d8e742f3a073c0d2c9a8fd32f0184b2489acc0f7f577b8fe4b2a3d","da879290d32bc7f8d6f1e98f911aa26e28e9a5353365fcab235631220dcf458f","542fa483fb0af5a050a8ac4fab6afa55991dd293e6a40c8ea8a30252ace164ad","d247f32a9559366967994d81db1fcdeb8d5a818d33e48577408d5e4355cd43f6","df44ef16edde77c45d5f34e6e679b54a3a2b392223d98eca3c712f059a07ab2f","fce5b3b208bd7e6235cfb37c347fd8d296a5c5c7f279a394ce3474dd05230177","3f107b2807f170b6f35bf804fbd86ff43800e8d5e9922a17772f0651cfaa3772","88be0192ba1b13ed14317710751f2ad2f82b2e1f6f9c1ec81a0a8d8547ab4684","45fc2238455aa65e3b4c8344b94c4c6c999df482a430c903a8e0496e105cabba","fbdeba35a2e566aa48ec8885bea50296aae01205515c3657aa205e182ee9d5ff","2f35432083547a52411b4b8128ab118601abc6a6e158a38894add0923255dc0e"]

Anchored

2026-10-11

Public log entry

search.sigstore.dev, log index 3199173952 · entry 108e9186e8c5677a85d2…

Expected log hash

3bc66074c7b0a853326bf5ba0590a111eee6455dac5c98c791c22eeea9a48920 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":"v1791689192448","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"in dem Schriftfeld werden keine Buchstaben angezeigt","rating":1,"review_date":"2026-09-13","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 (ffbc979c8901…), 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.