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 3272274666

Proof data

Record hash (SHA-256)

21c326bdaf67148a644abad46f667c1066e86ae1bafd22a09644600865e2cad0

Signature (Ed25519, base64)

WpGxBo5uiT0/Febmggvs5hq57I93JT0VFoxZ+gU8zjjwwYo4WqDt5QHxQ2Ga4BwPVmO4U/IXinir6TdEoTy1AQ==

Merkle root

a4d47c2a34f6eeba31e2744fb1551fe9a0e34820dfc152f1ad93a68b24759c3a

Merkle path

["21a90fd5f58d18a7049fd8b309ec3d1a2644242e5af0ff19a1fec5eadc5f1fa5","21a57a58eabe30c9eed8a4f33b27ae977e1f86bceca2186e900ca5e2ef4137ea","4f7e4ee25f3687ac31b6925b9fc7c6dc911a59c75e2a78bfb0eb3c1dc9e02401","29fdb8a7eaa31aa7f143abf1c791990a6f7e1d29d3efe09b1ef55ea856c8e59d","f5d03406ace13e756e2a77291903431710ab21b1fbf2e0f47de5db0ffef21cde","92123cf0623218fd0e2706b1d54574e214fac19694ba5e26d30ce9e0151718d4","df96f4ee224fb50df0a7e0881e1f1b79e75dbc88f650388a8c066d7aebc5912c","5ed284e4b8c02f83f2ba7f6ae64b8df76f6aaaaf8eb53023c0b2e5c5b6a58452","f3041dacb8ac56b82923b3c8f96184497b60ebef342e3b3f2eee2f184e2f0705","a143dd132ad90f53563cab66379bdcdbb78c0bde7015b9c46d638650d0ce3a3b","5d71dfb799af9616515551742ebf194eca9971ad386cee090b62aeff22bd1d8c","718239fed8057dcd9c8669511115793713c3c27b1e9657de27f870abdd5c7bee","0d7c4faad4992f205f2c1ebb2b0e4b1b7e9d070f1f77d3f8d64b80626c324f46","35108299fffbb5c1a0d86f074b5805457d73da5ec7c848a19bc9a928f6a42a99"]

Anchored

2026-10-16

Public log entry

search.sigstore.dev, log index 3272274666 · entry 108e9186e8c5677a2724…

Expected log hash

d56e71820b4c8c62b755e9f6e3d2b624566d12db6dd1606e99ef55749400c387 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":"v1792036997995","kind":"published-quote","locale":"de","page":"brand:vaia","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 (a4d47c2a34f6…), 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.