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.

“I wish there was a one-time payment option”

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 3240422411

Proof data

Record hash (SHA-256)

52cfb70654c621d3bf1402f7d851375c0e7fee93fd32d9d06befbbef1f1fbcf3

Signature (Ed25519, base64)

HtfznrwiQn3rtgX16QBAA/dQya1vtEJsa10wQcVXdOXgwJn7N1t4IvKIOnxnDPFV4fUb0tksyaYfd4f68YWLCg==

Merkle root

825dbc6ca55f00c6c81d8de0f7a080bad31b79dfa0e721dee7ded0e9c294ebb9

Merkle path

["52d8f86a097a5cf4b880589d6cbe5eb7a6ed5a95f7c6d4dbade6203f2f6dd7fe","9ce2801e30cafc01103cc44dbc37e0871d59c8341d7de407af8914a500db3290","3cb7945af43b6aa97bd476ac86142f602bf1b1f2973766d1afd4eedbebceedb3","f12a2b0a6f49fe20c4a2e42ee6d934a3485e0b7786484b42c45ddf9db14cdb11","0b1ffbeb76555353c64ab8f1759a45db99e7aadfab70d4b6b3a5d6afb766570a","9e9668ce11b664775157437ba80a861728dfa8809bfa7fe38c778f9eed285cc1","7e470f04ebb3b253c43e0fa18f21c7de9083e368f6bdbb8a87563915c4395b84","b0a10369b68a1998a462f8348593cb1627d5cc31984fe02a207cc99222c32ebd","fd5c3d3ac838e19e7b9a352963a7600555e9e63c5cd3c9632b1de97cb64142f8","d7e33ce88bd04522c9d3cecd828c2da64793cf9211100057a63b7ead77f85c95","c8b7d8e613e305123bcaa9af1ed1a7d0c72af972c727013e1367bc0e5df8173c","0526b5b7adf235fca820e27d7e9bb58328407474fe694c840500fecede0e4f46","1e2e9420d8c4747dca96dc342727525f4c47cf2390ef42ad69829fe37156235c","04c4bd8a9ef95bf5648c9d023612bd1f2446e83a6dcf83e612d031a5ea30e90c"]

Anchored

2026-10-13

Public log entry

search.sigstore.dev, log index 3240422411 · entry 108e9186e8c5677a0ea4…

Expected log hash

8667b0db28913263098c19cb6387cf64b6d68b1b8f2c4242d3139d96cef5da0d 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":"v1791861703078","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"I wish there was a one-time payment option","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 (825dbc6ca55f…), 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.