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.

“€90 per year is the minimum price.”
Google Play · 1/5 · 2026-09-14

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 3220562278

Proof data

Record hash (SHA-256): 2b7675ff7be57db3aed0a227b8bafee0d728c48f6c9d6458d54d4f41803fa62f
Signature (Ed25519, base64): fwi6g6IXT5XMypJ64O9ubQsYmaM1TAz1ziGDITRM5zqGByQtTtsA3Vx0TQu4ukZin/BrqU94v6KB4XNd+xILDw==
Merkle root: 2d214bb14438515f4bedf5edd9b00a6a5113a016ba9b9fe8160d41d7e6046722
Merkle path: ["2b717718d80b94b5b3605334aa429efc56bb1bb4929bf768afeaa2fecfac647d","7688f9d0b65fd5e61b3e8bedaf2481d61dbeb25be4d7f5d4b50596371e5f4ae3","01a6b170a1add9d9fc7b4a28a03f0d7662049d1b0231bb1f59191eb90b0bbe8d","eabea5ae36d41083e358b5725bd2788f9716026adc935113ad70564ca5366b9f","88f440969bc14c1cfe2bf028cae9f3748bf9787443b9164f76b286cef1561b2a","c5e3bc43c88348ed00fc6ab9e1986e97a790e6cde6da5d8bf5e8847d21cbcffd","0e92dbf76ae7c517e3e37b08a67d127a608bb326f0ab37fc0af074eccb00429a","e9cd5d1d98953c2b9548a094bee00f2d717d50b8b811a4a72a013c2ede482e1f","5cd45a808f582704ca5779125cea37c6c036d86081285e04254101b6ea647b15","c8ace66f595d7bbc4db32e1dc3650f7c08fd1ddfac3a9b6143cd92cb2e5a9034","6a765946c1eece595050f2a8d4bcb7c1c60c0ac38183d2bdf49521706099e012","98b2364feb69697f9c170c6c8c253e875bd2ca5af1617759a81536a90cf6f664","c8e78357eabd343df2a6d1ad8a9c122f986bc772443ab896b1e0fa855f0ebd28","35ea2df06612b261a549235c4e62b3e1ad1789f05da56f9ca671421e5071b72b"]
Anchored: 2026-10-12
Public log entry: search.sigstore.dev, log index 3220562278 · entry 108e9186e8c5677a2753…
Expected log hash: 13907aa3d3da271016c4b5e75946c4440692c6b4e1684187b965dbb983b157f7 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":"v1791777669660","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"€90 per year is the minimum price.","rating":1,"review_date":"2026-09-14","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 (2d214bb14438…), 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.