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 wurde auf den Premium-Plan umgestellt, obwohl ich das zu keinem Zeitpunkt angefordert habe.”
Google Play · 1/5 · 2026-07-15

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 3239939960

Proof data

Record hash (SHA-256): 2e168d7b83268aa419f4719f02cab825c4d4c1d209fe0a89e4828efcb13958c2
Signature (Ed25519, base64): jkQjFoJ18umuv13BlPYqsw7u0BZHOExRUT82lAveeMDYNWfl/RLRlnKHaGTmp03L1R+ems544t1rgKrPOmptAQ==
Merkle root: 954962254ff2eae9503796c02bd08deefa3a5722e4ac0b3981007e2b9ddd84c7
Merkle path: ["2e131161bc2414f03cefb32d8ad5273318b85e0c869bbc0f853d4ffc4a589e15","4057f71b927fc09f40cf33df1ade87f6b0b5dd0273cf2d0fd0e90dd50ecaab51","b685cbec3dbec576089056530a502eabde07334e298d7ab761ce7449bb220efa","091fe8066695c1e1d971915bbbb33ee0a9513f2a3869ca525f66bdecd91b42a2","1b7fc99e5717335300b2d096b9d8349ae2c027afb2c2d4b4af4cc0fa7f9f9c7b","7ae933c3821f9f6172d5e22c94e65fb23cc3755da676d92d33c759e2caa2cec7","0d233ae6e6613d987ff89d4f134f805104c87b6183e099f57c40930010f0a891","d9649ae2fe80b433bac46549402f7a11aa355b50fc30926c9bf78f1fb1dc9757","10a0f2ea6d037545284479d9c61748115dcd81fdb18591892d11a61e53192db0","4b9de0a9cb2e253d5787a11cc62bf51810ac91e95ac348ff8c792fe6c6f08255","17f443e26f57ece4faf872e420d90fe0ca13987aaa28191f15ad8b704c244dc4","37d889bdc912bd16145284899ed1544c934e2d5178cc362b2ba799bdeaadde22","07b2ba787804bc9fbb84c73bed76b7f65ff1b8c1694261a8264cf5f3209f315a","e7bbbee54f729cc449b73bfdd383c96b7b180e618c270037b5697f1fcc75f254"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3239939960 · entry 108e9186e8c5677a0082…
Expected log hash: 28fd9464b857a07e61931e67235e692cb8af33d7541a60ca163756a54a64e9c2 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":"v1791859824762","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Ich wurde auf den Premium-Plan umgestellt, obwohl ich das zu keinem Zeitpunkt angefordert habe.","rating":1,"review_date":"2026-07-15","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 (954962254ff2…), 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.