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.

“you need to pay for the features you need”

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 3240231023

Proof data

Record hash (SHA-256)

2f8e61f270c38233719518ce8d3db0452d695fe6b1a4d9e1cdc1bd58361ef523

Signature (Ed25519, base64)

G7O49sl++X2q26weyCw+EBtaKty4rSzC4qBUC062g3GbS0uniqIZI6SkJirMt/81UBkIGjf2FfWMuUmATmO7Cg==

Merkle root

888a38c73939ec95e6f226dbfb3637325026fcafc5a795aa4e227b811d6b2c84

Merkle path

["2f8d3c43d2289b86e3a18f894bed26da3b71ff95807a8e4e9c537181b2b487ad","b7b829777d1294b914c05717fe638796883241c282c48a7e5c7697d54c3269ac","cd36e7a00e371eea0b65f08c885c2ca76853a76a7c3bf5e1df03eb1943bbf447","314aaef2f76003d4fe14181de3e185e04c184885ace064426e9a73de3086152a","d470a6b57d7f788d5ae5ae424a6b43097795115fb324d6f37487953f4419aa35","b31283f964395735200a81539cbefb6821ef356b47a1448a9ceb9611006dcd43","faa1bec81daed52445aaaab1c2bc91e9b41951e5e2bd2e0741bac1e211ef1686","b671a7a60d4d74305a8206cb698c5de307cebb5fee23fe5778e0d9dff06b805b","65c9a2af503d03ece1be7a3adb7d64fa4b4a9b41e91d187da9919ac266936cab","b474201a458e05716064da261cdcd6400c5072a1aea81c38037cc52ccfcaa3af","98b53817122fc86b6561e134e40b506483d29662f54858e04123e9f55ec0106c","cfcf82b47bc6a006b7c11e5183fbaa666e00ea4d950e64e1f574bdafde8e1583","410ad2e8ec6f218bef120c1cded3462a092f61baab59fee462fd9704d436d66b","f46648ad2fd9f2769b9fc0ba1c434d2040de67cbd8b7a61df7b7575cd5a9206a"]

Anchored

2026-10-13

Public log entry

search.sigstore.dev, log index 3240231023 · entry 108e9186e8c5677ac0ab…

Expected log hash

bc440cd3136178aee800fe49b9cf2e319542a645c9abbb8553c6ae1e354ce201 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":"v1791860805798","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"you need to pay for the features you need","rating":3,"review_date":"2026-08-13","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (888a38c73939…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.