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.

“For me, it's the perfect solution for learning, refreshing, and 'preserving' vocabulary.”
Google Play · 5/5 · 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 2904877428

Proof data

Record hash (SHA-256): cc8580896ad5b86b6cb0b4b32bfb7f4f3379a1bb204fe97fa9d4c595f2e1e702
Signature (Ed25519, base64): nY4H4Fgrc2zGBaQN53awf0g/ijqEtv2aretE2QaKxFfKqgrKjsquugOWw5aDqqXUB3d9q+l+9sIP8aBP2V1JAg==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["cc84217dc310c2b5d3e377ddc8cd77b77fe2fbe38926c837f11269e5d7becb72","5e563e48b9aff902bf4611562836bb1e52ef27d3aa0ee681c671590cc7801498","d323d05899e0ff14fb6bb151b033bf138b9f60b76a2f41fff876201f68c2153f","9e664f5538830b3523b36bfcf07451ebc5e7f32b8730fd9e397f1acf0b48dc00","f037dbac194211848de193c9022010428d743d10212dcb395d34e207d6a1e79a","8b20c680d754b2761fce91b5b31c8a6b3e6ee2db55eab38c2cb4dd313e78d120","58771aa9bccc3d1076190ddc3a962089091d0a1fa274636a7d2ffad41d6c378b","215090194cce51fcb3833e38d963d1218c8731774c3c4467559ae4d1e446ec9b","1e07398ae3ef901f9485f82e2568661efd83a8677c9b25a837d2af5846a0cf7a","610534309bbd1bfa5793fabc1254f8e9ff0f3706e20effd4937239e7376cad5d","f88be881ea062cb0d1c908f07c2bc25877d657079958d9ee97dfeb71a5747da7","bf08a7b70abd12d7b26586897b736d1c0404f066aa427e277708a875f0cb6bcb","06f94171d32c86f72a9e1d984f2a7c3fa7bd9f00a98eabaa3fbd7d57db71aaf2","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":"en","page":"theme:vaia/quality/en","quote":"For me, it's the perfect solution for learning, refreshing, and 'preserving' vocabulary.","rating":5,"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 (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.