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.

“retaining important knowledge for longer”

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)

554f0219514fb64464daf97cbd282816da9304a4eb54a31498404ae3f27cfc07

Signature (Ed25519, base64)

cGChcChtiUv2gzuyonLcOzjSVs2y5tD5ckgpe9wesX7eLf7NbosJ1Z13zdWKf5cY6CgXK7blF7MDZ8f5YQCnDQ==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["554e1c1259199770d349d2434ad8f257aedcf12eed442094354bd308c9b6266f","5189286acd90670b541ae36a38d56cde1aa6cbc501591803c9ee5b30778f924d","1448e79aae1c58b2607489bb6cb376e36b1b6ce90cc1d6704121d32825ca9a77","e16f33d2892b00069680c8284113f00e390958d5bf9a782d5b53cf95095fec4c","fe51aedaf9f1f1a787eaa6e4a481e52784d7a6595ca5cec85f5942273354fc25","e94dbc4cd03fceae144a64f4f2adda19945bb29467038743a4315c0d7b91626b","0af5916ec2eb3eba92b75ce0f09c98a2792b4e6220e26730f1df5bd36a9afa82","7067cb76f406b948eeff1357d6e61990f2614be3db8d4fafc132febee6ece07c","d1fbaa7a96bbe87e3ce35325d163aedf8b475f641bc9675f1a750a585af4cfe5","36b43838d83532d6dd22c9128224527797507b9d3f8aa286d95efafbc0b0e80d","b30b5bd263d48586ebd97cf3cd7e0d28b99e3f55621cd3d4efb024958f812b61","44c08976ee58b5cb058f11ca9229b8780c4a6cf8c64bbcf43373011c4a37225b","ac995c9ae640659c6b258d62d0cad1933912ca122fd33d27f90560dfd3199a84","aa4bbeb87247c2797626ab02a549451da6dfce4dcb854a36fdcc601e3e788772","bce5d442c07de6307e5ea8947098e74ce88c2246eda5e5fc1015a6d7519228a8"]

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/durability/en","quote":"retaining important knowledge for longer","rating":5,"review_date":"2025-08-30","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 (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.