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.

“The app created great flashcards from it.”

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)

4fd5f9d40433673e419e0ac898d2e34b67b690e6c5b24efc8021ec619a160583

Signature (Ed25519, base64)

3DD4SGdamNpMrjceyRVnxqNOS6hyiJ24eaB3hNrdXVSlmAmHSY9fVjQlm5mcnU90VPFWuFmsAq4c19kPHxJ+Ag==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["4fd243522f5480b6775c98495f40087ccc6ffa8bb2a7d57196dce647837ce478","8dfc2c1e72c0719d8ba5d6554e98f2198b2ec41d444339523be23d9364aa5d23","5302b4b0a5991e312f1e9aa11594434566f098c28bfdc1db905f73fc55a13105","df3c6715b1489b6f1bf14857bfb3b89a06a353fc2b922813f96d0be62e2bcc73","7542a62421371429b827d92f7e06cdf06c9a2b8c5a96078d376f4bc15e88b882","ec0c5acfe3f92d337e5f77fe871b03b438e47b05a2d313a2d4520da6aa0dedd3","af31cef0ca5234904fbf13336b6e5182a5c96186379165e7af98b12548f98fe8","ab76e72374adcc648d7755094bb1ae0953ccd26c8cc0ec3d85aa1f875bb00bb0","246c836a4dfdc17479269e72caca490062b02aabbee862b1a14ba125918c4bae","0a248bb2d9de2bf2f74704e7c7c027481bdd2e66077a8498884d8fa945696d40","7d0a97ae88d1ec4b960642b3dc54d0419bfc6e1cad0abfd4383c77fc83cb691b","0197d988959ac12f7d8946ff2581c88b7ba9a4305193828cca53fbbb9832a064","bcc0d977b8ab2060a87584efe5d0f5545e840726716d3f02c248db108122259f","6c299608515c69a03540be35865f96ca4932f3e0403f8f39fb0e1c2e2aedffb4","43a562d6822dab12c673c1efa0a3171d1ef69b949f676fb01847e1e5b56274de"]

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/durability/en","quote":"The app created great flashcards from it.","rating":4,"review_date":"2026-04-15","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 (b9a08f9d6d76…), 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.