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.

“Super App, praktisch, nützlich und einfach zu bedienen.”
Google Play · 5/5 · 2026-03-06

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 3258201873

Proof data

Record hash (SHA-256): 2e287438fb0fe670721e819147d8d1ed9f651b376a0343f72f5490e0c0f2075e
Signature (Ed25519, base64): PbAhPuN99qJyxdbvUanqeeZDWhmY7zb9DACGlD4JyAlKMKysh//IO0c+2N1kwbwdRKRY0RGMGbZtlc5E20/hCg==
Merkle root: 07e2d0de1409df9008c16531abbe2f8515ebe8e55b87a042e18a21958771618d
Merkle path: ["2e279dd8151e935e13cfa30f7554447fa3a3448d86f2ca1a0069a647598cd724","6ba7c57358a783c2e43aef33903096916bc55aab47cc92375fd2c41b6d51de0d","5fcbb326a01884db187b0c6169c4cd4743b1b3cf0f483c00e72dccbc3207c87c","69fc33f9d9f9f14b0088975216e120a08de6d7d89e72af3062157632b200ffc1","1bb37807bc02ecd94c9aa8806e40f84deba155a6b931b7b5a1a597a5b687f659","377b3d8f16c121037b7c802a04ad2e767565c6257aad623b245e52bd16c7fcb4","1b94150181777ff2b4812fc88256c7f05277697c9e3077467766528696e7407d","897ede89ade30772e984b14defa9f32c25b3f26d3dfe96887686229a4cbd300d","b0a498e98f54ffeba1381247dd16d709ba64b94ab88aaabb2dbdff58eca6361f","5701d3996a7461d303e66007d264f659da4d4f33403ad9cf3491382efd9872fc","46f7d1965c89f3f4b2a7c7988db8c93c0be2fb6e6b7dcaed9bed486cdf5cf862","9a75e3f6936d56126d6fdf7afc9a8945cddff81ecabadfb2fe720f30ae044194","48799695a25196e19e6c0bfac80015199da758df0acb5108e4c517a5d6bc016d","fd7778befb9f979134b4d8a1dfa78827e64c761abd83cab9d5ecd5bc01d8ea14"]
Anchored: 2026-10-15
Public log entry: search.sigstore.dev, log index 3258201873 · entry 108e9186e8c5677ab04f…
Expected log hash: 205b794967d70c4ec2534ff3766e47506acf44c7c68740049459394876120dfa 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":"v1792030899870","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Super App, praktisch, nützlich und einfach zu bedienen.","rating":5,"review_date":"2026-03-06","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 (07e2d0de1409…), 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.