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.

“It helps you to prepare for exams in a Short time”
Google Play · 5/5 · 2026-07-14

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 2907673729

Proof data

Record hash (SHA-256): d3a641e0259bfc764428660301617e307099448cfeaa362b0bda3e7891343947
Signature (Ed25519, base64): EO84SrI3WWrbmD3HalShu78EoUsHjqoQOAHIUMYzuFD1FMzw8sgu24B4u9/G4kQxhjbTLXK8MK9zPDCEicC3Cg==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["d3a906af1cf89437168454648acea0362385eebfe3fb4310d681ea1d00aa5be1","c6429d7df0d6a5ab35b7f21b8c184b4f3358a3df01c880b28e1b29344774cbe7","c735c107dc34bad68095d5e1b8de5f917383a4c92f404df1795e643124860d2a","008285e4518791cef6619ade72a362699e2bb779a3c472d2b1046403f40f160a","d63ba908794de6028712c572b90ee6af5b5b26201d82d36c3c1dd5c0e0c8933a","87b1c1e82c6c015d1987fd9d0998b67ae786d3f5369880b2c2034b3f627df984","4748ee030849d6782774dd0074d791e793e5a4db5f5690bb3ce1dc00cd8d0cc9","df35b7e24708696ead3533889ddbe38c49cb0077bff964d0a9d7549e7cbf9083","a8252b2db3066b4a1478be5a406e31ff1829812687a3e2675230f43b7502bf6a","993ba8af9345b68edda1f6bbcf44d39a7a29f45add55401177b78cfea94d4408","5fa4d2509ac4b266680172a1d644b9603830e2992eb99b956b8d4389a86690d7","1324e7f8581b1cc3455b81e88efce3958a5b23eb7205ddfacaf930e32b10bd47","ff0ce3b59f4b6fff6b806e01d20d764fb2b7a5651693c19ab4bf8a8b5ce5f968","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/price/en","quote":"It helps you to prepare for exams in a Short time","rating":5,"review_date":"2026-07-14","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 (b9a08f9d6d76…), 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.