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.

“Habe das Abo gekündigt”
Google Play · 5/5 · 2026-04-21

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 2907673729

Proof data

Record hash (SHA-256): d8db6c7b84acecc5eebacb1ba6f044e4b597e50afd96189608fc472864e113f0
Signature (Ed25519, base64): kOdrNNje+qfXIvFaH/c7tfUNU406hgrboMub44N2WGRWnJVFkamkZ6MyHdQ0xP7N+NN7ywqwlTTScWhYLiWuDA==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["d8deaeb94280ad125f4ca27b52cca18ffbb4c555c3d668ed9858f4829f5ccba7","3a65cfe95be37e20523ca0613bcb9dc4d75ed48c57f910cdbc9fd59b33ba029c","4fc4c29e73b5ce2988a31b2a6ca2d68b369d011779d601305bbd64f2eedd8e02","ae10753f68fe9fda13ba0e379ac4e8758733a472f08c4757ab12b9f4923f391a","fec9be856cd13b598d77661a9bf809d74d4c52d16bbc62c12a5826757ed3af99","3e1167d21b44d823c06565168ef87bf0a274eebbd0bed62387996505696e039a","735b911288b83c69f4ba45a8f8f0a64d870a3e5b2e70de25fc3a3df07823ed91","05ac57803bc5cd9dfc90de0ff44e7504e5b006bd557d1a4bd5c22fcc772ddf31","f7384021a197e13f40259eb4c775c70f45ebff0b746b2dd83fdca9544f4fbfd9","2bb5ff656c7973cdbf520df3c851c90c28841be839fb931187a0faf4b7c86f3b","d724de4db852592012d7e350c865d36fd56f7f3bf918292f4d807bd4b562df22","2d0841904d905b327cb803816e73e56fa86447bd28a90f792c27c874ed9a6b9c","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"de","page":"theme:vaia/returns/de","quote":"Habe das Abo gekündigt","rating":5,"review_date":"2026-04-21","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 (b9a08f9d6d76…), 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.