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.

“I definitely recommend it to the students who don't want to spend 4 hours a day just to write a summary of what they've learned”
Google Play · 5/5 · 2026-09-13

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 3240367269

Proof data

Record hash (SHA-256): 4b6cdd4602355bb7302914ca29ce1b5c040ef281e76c3793cb9693e0b3a569c3
Signature (Ed25519, base64): qoYGZD2j3zknAQoXqcjUf99n6mgz6QzXOGDMT/0K63ROWaB/cAlGA5TsvGO6U7ViHHaFi9inB0Ku+kfdeF+hDA==
Merkle root: 1da6cf8d96c8876e66e82e9bea7529c76d7e25eda1c07550505caa1baa49c4d1
Merkle path: ["4b6992ff95c4674d61a55101724e0a2b22e0a8a5625a41f45728b6c87c8301c1","370b3129060d4fde8cc37fb3ebda83f7967ffd0ea8f5b6f6dbdd562638594b0f","46e99918da26b0b1512ce797f54aea23e5383f78ed240dc52846141f65e8240f","49a35517c711df3f5a8f8866bc79992b75d74cfc925c4d35f0577783dcd61ede","c9b2aece21c8fce40332cb00d8e8cc562f0515a0b42a65b631ac4c0480f0ce49","3b4e10f019c13ec916d1f12eb7aded37fcfee161f5089e200b4e672ca68f97b0","5961093ad5ea7b32c6578b12686e172ef2b7605e5a4a0a81cd1165d8047cabde","7e3ed558c9ffce6e8b0375d750fefa76b3f024b06dd38365765381747c12ebb7","63cac8e529d0f949dcf47ca7da009c573c79d777627c32fed72356fc43e008c5","0a78e756959175f4ab54b5aaeba33abc516cf390ecdc63475b55a39a5cc01baf","67e0df2f702b6977c8afd5b2e15cdc1d71870f928c9526ffdcaf399732267f13","994e6d7ea103100577c4cab0d6712d9ad97559bd32eecc5785d3b2bf668cc0eb","d0886e619546ab8e630cf9041b21d39a146861d5b7598b5044808c3537212a80","2d81003ff1cd2149e42eace973cb0f4cdd39b653f7b06a20804a1f1025023ebf"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3240367269 · entry 108e9186e8c5677acf8a…
Expected log hash: f6397ecd2b8639a3c60345d0c567eb602411c7eb1bead248c760bae850816087 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":"v1791861381931","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"I definitely recommend it to the students who don't want to spend 4 hours a day just to write a summary of what they've learned","rating":5,"review_date":"2026-09-13","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 (1da6cf8d96c8…), 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.