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.

“explains really well”

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)

b26f798dbd28be212b1b10eef8ba5e191c12359387c21d28ca78b8f74926f22b

Signature (Ed25519, base64)

wrEjJvfsRdfSKDktMk9qiszUXrh8DfNV0mClDm0yNektk2bxJPYpyEJZXlJOIZObjUnMRrOj8VcOpCgDkqQnBw==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["b26d6f50215cda295f5ff6445630e62dc671adaac6927508ffd6b86e02a285d0","7c99db7a5c0ac69d6ba3c248db4619e62d7a02f4b3add07760d6a8f71348f674","ccc504f2c78172d25668b0559a651351845fb2043b428c05824dc7a974388f56","bf4521d4f08e087e08f4c8f0ce5e72cfb76a32990f5b902b5b5b5a08ec093aed","1ccd00d7f90f7f568272b4755eea96e32fe72e775ddfd4c551619e32b9f841de","dee96fd8ee9a8ea52e5aa7d644eca16293f093a9091aeadee54f7a72875cd9e9","cf7814bcdaba817da9ac56b5db299e3244ebcffb4750c39ece6de107d4eb41ef","55f43fb61ba6e36a5b43913339670fee86d21128d37cdbcc85c3e13c33ac28d0","1c631459a03859c2a8f16891e1efa88336cc5e0a6303fd95cdf572d0365bc99b","620413bf2476cd28d325605187d6aaba277996d6475a9bac38fff50da78fe34d","c5b7e137a8013a4a21c1d5b67afcd303b0734422cc0c2253880dfe8a42a53397","6c2612f525e9372e44b0deeb0737e4e68d621df2f62b7144b07119251a9b517c","b5d03b72964f911025dbd61c2eea673598b47768b7619e9a279966a44a138147","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":"explains really well","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

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 (e299bf38720a…), 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.