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.

“something a student in high school can't typically afford”

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 3273209361

Proof data

Record hash (SHA-256)

2ff65657629f6c44de45d72fd41c2b59b984cd83da3d33e23be2b78338af22cb

Signature (Ed25519, base64)

bgU9xnaE+JwnJ2YOdPFnRzLrxXLxYnTAxmARM1lXRN2m0jrTWsur0tSsvPM1wTrUurl29lsDpeif4Ze5wSoVDw==

Merkle root

6ebb2d3fb78e4a08533ac6b6852f3c84687141ae9b0e78424d88bb4161267bbd

Merkle path

["2ff7a600c651d095551e2e16b7dfb87a9a99b2ff4811f0675ad9760ef34f1fd3","4f7c1b4d9f09d83a5b9ee9d19efc4bae821f68999d9b8e18c02c77700a6c7c95","f6e33ddbcedfa4a02b66c5670bf9f5741efd104daed6cedf7b0449e90eddb75a","b48a7400529702d0abe98e3d46c6d2cc2d34857d71bc2fffd45547d4adbcfbb3","725df7a6e7ae4e0a6780bae9149ddabf9ce2043e136f6091b09f6067be38d1cf","558713467b8e2364d275197db2e9d92e4fdb7d97381678f3fbd145e7fc007daa","92cead955a2f55269f403c4394910bbaf99572989b9982421d05f33ebe758f51","92f93ad5f01dece07b54dc38495bc7dc023d5dbb0188fa7d8534031c3df3a9bb","4b44b19138a2f818c39db08e9873927015ae696007a51fd23ec4458bd1376f87","92dad562c0ae81efb9c22cb4a0c96d5566ac3900bee0a61ed1b3c342720c0f16","c6505d62fd1f18a4c80c5faa97487c91b8a68d4c0c27d65e4983982245aadb62","fc73c2b0627636c8f676f008d05fbbd4dcfb7ee0af08432d0bea252601b2007e","b2809ea8af334e57adb596cf07ef2c411ca41ee72761a0ae0fbef01d75a71a23","32d6dd564d479cc6b7834d44d5078d8ebc72c40210e72f0d380fac04d2d8e87d"]

Anchored

2026-10-16

Public log entry

search.sigstore.dev, log index 3273209361 · entry 108e9186e8c5677a732b…

Expected log hash

bdbef22d23477d2ccfe2ed182ce8ec54934b3bae489c9913db850af171e33062 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":"v1792121074379","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"something a student in high school can't typically afford","rating":4,"review_date":"2026-10-06","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 (6ebb2d3fb78e…), 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.