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.

“exzellente App”
Google Play · 5/5 · 2026-09-16

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): 9f26571e55cdb07d41dd5589695adabb951e8f94ccc06df9769540fb04358aa0
Signature (Ed25519, base64): AHp3jkwq05vRjKc1a4h4oPZQSorHInYXJNo9ZcIBlsokSyoWFlGIkR8Ey3QNESkfgM/Phf4jKWUQGki7rUdmBw==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["9f28e5fa331394febffe1dad7e35054c1b719e69d458fe8030811ac2e14ad805","7f24184b06b458fb1eee847d5989225822704de7ab14a1b2041da9d475d28b89","b4d9f38064b6fbe8cd0bcd0fed876b42b577a359cabd5188557472a73c5476f7","e74a25310463ee5dfe9b10b8295382f6674cf8c2eab79954f8463ea7ead9207d","dbd0de529fe4c3e0accab82124ca96af812bf653868c36df112d297a5655900d","6921ed5422b3d3000a2e72b1e757e526f7322f2dedbdcec265f3b1cf2a5c333e","c90328cc8699fa17657ffa4f99dff7564eb38575a4311f044a616890aaa3629d","c0a62b8031590dbb8c3c457c143b90c53bba01241f974628618d37f768dd51c0","4f4b6630e2c4e36f63d5d878bb4ceb31c888b286589d974b09511b3732de03fd","72445aebf1d9fc469248c1809af39dae4de7b03ba26ea5cb00c225422cbd320f","6d2c471b82300715f66f5dbf8b523ac1e6edc072f3668c57fd7750412f90467f","81ae0d98613af401743ec4987802323d53d8fda24ce374cdf2d369d04f6e8e3d","b5d03b72964f911025dbd61c2eea673598b47768b7619e9a279966a44a138147","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":"brand:vaia","quote":"exzellente App","rating":5,"review_date":"2026-09-16","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 (e299bf38720a…), 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.