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 just downloaded the app.”
Google Play · 5/5 · 2026-03-29

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 3247835674

Proof data

Record hash (SHA-256): 3d63abf07812e50b570f3cee8ac6d41015ef2f823d2e72d7fe4f2039204ebccf
Signature (Ed25519, base64): h12ig8Dur6mFRg+Kd/VoaISYS8TyPRzXBzP/moq6jxpcF3WC6NmRwdgHaJesxC/hvXzbWbodXM0CfcJVkg3iCw==
Merkle root: 8af5f2f3f65c47a75dcdddbf363e3e76b22d37f4e953d150fcfa3e84bb04dba5
Merkle path: ["3d550f91396e236c0d7e76d189d1cff03c3df914f39efb19f382e9134148a05f","7f261bed2f87c1cce2e5362b8f3941afe1ed440ca4d8d83632ec4b745040c2ff","4ce310cb5649126eadd018a24427623a2c57d0826404dab9d3ae9c9a5c0a0989","a4ab14ff3d2f7a363144aa98917887ef0d82d8249c3af793b7637056c7e4fb6d","b1fae580510088a9f62074d96250b414fcfd43c0076cfe9d1b8601299904bff0","6bbc1bf09d46478b88c7570edc0f06c3f6090bd27edb8579dbd53eb26818efff","3d5ef2738c1487899fb625ead048d831eed31833df2f290d92f217aa9b0d62b8","8640be2c2904ad74d60628d7488b1886a8966d52462af01cdede6e53a34a089d","3e3a0ed143887cd81780202e309390a905207d7b6c61b99559cee66796c14796","fabceb1a8709728edf48f9519ce09779d16e9b0581731bd09056b73ea092aa51","f85dfdd2ab86046e8846d1cf4a09b7f25f7362e1cbbb39e975af34e4c92fc761","655d3cb3e6f23a95a7bcfab67fbd3f535bbc0ce71a1ebce283b6fa005ab8af3e","2df4d836b73633f71fa96faafac3d9d32f00951d180b99885afa9511763f7b1f","2212eb5ff51e97198ac2cd6542275dfcf712b9be9a8fab294a9bf844689bcee1"]
Anchored: 2026-10-14
Public log entry: search.sigstore.dev, log index 3247835674 · entry 108e9186e8c5677afded…
Expected log hash: 306cff230c51a4aeee6711c8f2603eb2af6985e8dc9f5dc959efafe3398b8caf 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":"v1791944613264","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"I just downloaded the app.","rating":5,"review_date":"2026-03-29","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 (8af5f2f3f65c…), 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.