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 have to do it from other devices”

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)

3ea59d40d57a4e22f48f92683fb47ae465d7f2b35753eb71e25c0af2f495f70d

Signature (Ed25519, base64)

zmXmYgAvhlTQFjGHEoMzI9uFU8Gbg0fRjBx9MlLRFGwFqegW0XfCpjBHTuRpXsJgPK34W0Od8KV4SRu7MG48Aw==

Merkle root

8af5f2f3f65c47a75dcdddbf363e3e76b22d37f4e953d150fcfa3e84bb04dba5

Merkle path

["3ea569010f540023335837248f43608d0d770da3c8c40904bf3e5657aba6d024","dde97b54ef37a6f69a9a4c1ecb7b749908c2a211ff7bc8beeab709ab3294e007","b39e0b43d988087147b27fb067e466249fc3eb10958301171f0546fe6f374bc4","8a6c156916ecdffc401bf5ec696db3468176e1df89c4bedba0d49e8e510381eb","93efe832425db3bd9eea202cc29f376ec448edc68d25f0da63a1c10e89092956","0d6a6131f9ef3efc719845fb40a8afdf00f06a86aedbc4910eceea246a5d574b","2c38d2d9ec487c3ce6fa6c4189e6d149e275541eea98b77d40e5c8066fd9f2e1","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 have to do it from other devices","rating":1,"review_date":"2026-07-30","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 (8af5f2f3f65c…), 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.