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.

“especially for self-assessing content when uploading study sources”
Google Play · 5/5 · 2026-09-17

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 3258071454

Proof data

Record hash (SHA-256): 2dc0c0bd7e1fa944ca05ea636785bb7947fad20f3075ff4debf19d4513cbc65a
Signature (Ed25519, base64): r8X9Hi/FvKPv2kyRSH841XQaaSsxxJReG/FIP4uQ2mF4YXGjwtBmQ1wXyeBYt53qsPcOzIh41k4RAX/p52cFBA==
Merkle root: 3286418fc06d25de584969d1d1d5f4b079918bf6b5a5178364cae8b78bb351b2
Merkle path: ["2dbda61f59c8a552119ce547f5950ffe84914f164f226c5c07905302c3dfa55b","4e8c19cda37b378023dde0298a67862bb329e25e0da0208ebc43781d574fd9aa","cebb4e77d345459e3a6182dddd77c3e0fd61c285612839b2bff18644ee53b700","af1d69f2d443bcc5303d28ccfff2eaf188ff460f1608ee2fb60d05e56d396d4d","56eb232f1d2e236bbd12625d10c2d34aa8ebfcb765d33443a47302b85ce7a184","a33a132543db7ddf62c443ede50e9871113f738f0abf35fb59f05191cc1ad006","2ddf224c9f885955fda26698738f29e1b54b31f1909c18782644c4e450007390","6c90412c55861e2daec177421f07c4f3e5cd1d31b38b7c9d0b76015072d34f2d","7ec333879fd128f00b0daf7d8040f2b7ca015e56aabd54803d4f91eed93c8be8","4ef4a903d1a840bcf68c5cb40d775b696dc873fd00ce9c0153605e2db3981246","1d1100be7a34c450ffa8104880455cbdab68faab3fcf0b9a1902eeaa174e1fc3","49e05cfef927266c6a609e22c205c5fdf538ab222e94c5e3282700418f88dfb5","d9800b1b87d047478eeb89f8a1dda19593d3b273c40fa6d591a1b944763f5e83","b4d8773b8032d1dec9dc6fa4ba1d52baf4d9efac6a7cb542ab0617b855dc5284"]
Anchored: 2026-10-15
Public log entry: search.sigstore.dev, log index 3258071454 · entry 108e9186e8c5677ae2ee…
Expected log hash: f9026b3bdc4a2e986a01140b2370b0ce9ec3e7c9353055dd7c9909c6a9941809 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":"v1792030101458","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"especially for self-assessing content when uploading study sources","rating":5,"review_date":"2026-09-17","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 (3286418fc06d…), 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.