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.

“How about using an app or just looking at the screenshot?”
Google Play · 3/5 · 2026-06-17

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 2904877428

Proof data

Record hash (SHA-256): ee3d1dbd18100e14ff8a0baa64480f3326d8a924aed9d50aca2a68f26eee03a8
Signature (Ed25519, base64): DqDB6DsVgqCZFjwLWwPD/i+PvduxRR+Ym7Ug01fGNu7EFgQSaHoe2wPsvgxi4ar0gbJs8Qyt22IzMjvwoUCxCw==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["ee3d46ab90216d417f6a992a69c9f18c6c00113712263a7e34b844d64232dd60","b7b5634482210e92ba5e55f0aef76d2bde7961cfb85e5032f526825253fc44b1","64bb1554badf8e714d012e68e60cfdfed4d7dbf92ae449009f779812948e5d72","af42219158e3b1d531ade7cba922b7d7b7adae82e7cc7b4ef358e8bc5a8158ea","00d2c435783670ab85b026d315da3d8927deccab216c396e7beae29f73a92936","ce8d57b6474b6eab6c3f4167d4593a56d51e0817ba408e6f994815cbfa4b5fc7","f7820f3517eabf9584b6c6bb12c9d28301ee40251cca2430d8cbd9c0e1992be1","240f4cfe98ed410486d97feedb80e1a568650936366451e1d6f8020f606b1063","74ec11c72df9a5d648ca053faec40e5e2615571b6b2d87128537aa85890571d5","2f99031d1c290dff8d9f6c1f2e8f06da519449eb2614405d9c5ee1b450886c17","b331093f92df4d03f0bcccdb4c283a2d98779d6c363a06d0cd9c35338c6b7f1d","b382aebc31acbad71afb3ae06e4e6f9b354e9da57050f36d03bb1ef97dab503a","f95e3a68f572f5650a4093453e2bf28168547fa91a01ce08e539b3d7016a3f80","53a8a23597d45564e495678bf6125e41ef42f347693c924494330dab53ea1e2d","2a462314156907e42d6f0d96eed96123f1d79516aef73ed189d9f5466556b638"]
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/service/en","quote":"How about using an app or just looking at the screenshot?","rating":3,"review_date":"2026-06-17","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 (e299bf38720a…), 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.