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.

“Besonders enttäuschend ist der Umgang mit dem Thema Datenschutz:”

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)

d4c21b04e332ac5414094b75101ab9b764452d867c11a90e9ac3ca51329d1b16

Signature (Ed25519, base64)

aLZkGArVqtwk+7YIbAW3pvxinuZl+c0l9NdfBUn9k2MdnuOBxsUX2prGbjvwiNZO/xR5EVGcwue9LtIV3fvrBQ==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["d4c9fec38ec464bb70dc3bbe822f48888eabf722eb417615f76a097fe25520aa","7bb18b86fcdf51c1f826b54410a8f7ba51cca065af5099450437e43c97c885b5","1b32c3c5299d27ca8cfcb0d67ab734e04b95c6aa5d448ddb447b84aeac2188aa","b95fd21b07f83eaff851fa016b163232ea8ac4f708a9bab8465ddfeda9f1a35c","09c6df0f135dd653b79bc39920a61d4a309df4089b989ac6e9e102b8fb4a7120","ce10f4fb198f54e3b6f6ade2d0ede40acfac1400fd6d04cc0c0163220c66c8cc","59e60739e1387c754852301096317ccf113681bcc71bdcae78c6307bcba60129","23c29e4a41dbdb3861cf76f94dde9273492080faad16cfe6854fe5e6aff68d60","48af355cbc83c873c6f9e5dd986b468c5f11071d8ad16078205cd27ee605a1c8","64af775fb7e27729ea2cc1b3c5d5f572e79919303ede1449f6a7f905276e5df5","8dd3545839055f7d4fd148a3c52b8f00591fec4cff65bda0b272f8625df59986","bf08a7b70abd12d7b26586897b736d1c0404f066aa427e277708a875f0cb6bcb","06f94171d32c86f72a9e1d984f2a7c3fa7bd9f00a98eabaa3fbd7d57db71aaf2","e3714293de39ce3c6e3cb9d5ea7711343b19d2be532c75504682d8ef52e8f91e","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/service/de","quote":"Besonders enttäuschend ist der Umgang mit dem Thema Datenschutz:","rating":1,"review_date":"2026-08-30","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.