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 habe die App gerade erst heruntergeladen.”
Google Play · 5/5 · 2026-03-29

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): ff31ab7ec79598ce59b7805aed00feacf1785092d24f8c0540cab4a7f1a69fa8
Signature (Ed25519, base64): p13xdq+7FcESqCItZmrbZ3m9vYbCZQB00FAYbiNRdkhZ+/pgLywPI340mETs64vIHaRpgnLrDBjO79bRd55lCQ==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["ff300f763e9d1653763a64c152bb7758032c0db79ccc0727ba9fcaa765ae2d62","2816c53d22a30126283058d1f3ead46f28e66001c9abca976b36a81f54e27836","8d35a6c900e54ff61525c583d5f6354da084a45b01a4eb7cdea3c61f036012a9","9f0208619ca28d6a821abd2ee09bfca037677fc470f41e303f498ed6b5d736c7","0f5512033d56a91208e74ff51352f3dd20ada32d77e9ae707d4f6d9b26e76311","c13ce3b4f136bbd7ca7f1d6bd7436cea6ed0c2709aebdf9a143f4e66b48f8c1e","6f1796f0a050f332a1319f469f9174053bdfc72a31c8a73c517eed74feb295db","63f1ae08499c5441b943b9f9e9e6575a2e24d875224fb1d91a5d0566e9e4fbd7","dac811f23f39e685b833f1304f7da13355a4ec569398c7e551687e305c7a317e","53a8a23597d45564e495678bf6125e41ef42f347693c924494330dab53ea1e2d","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/delivery/de","quote":"Ich habe die App gerade erst heruntergeladen.","rating":5,"review_date":"2026-03-29","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.