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.

“My suggestion would be to allow testing across multiple flashcard study sets.”
Google Play · 5/5 · 2026-01-27

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): fd808198a80ff4c4c559adaba061d56f8244fc8771c69423f52c52ca8946ccd6
Signature (Ed25519, base64): iEOcPzXHVrex4UwRSgfs7Dih2/adrOU8cYE6192DVYlLK5toiejbog2Yls/8ChzagUSgOLuD7vKiQ6qnzlGsDw==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["fd82cbcf346b8396ad1077e3b1adc96c6a6df4d48ad4d6725d60aec791113668","7d8ab1d215fba2028c545a49a603828452592b38d8edc6ae4ab4e41ea5ee0f25","503cab4ae7a74da0bf2e29623f4712c98578f23abf77e52aff3dbcfd366c66a8","70362e742f79dd203a857df4ba9315d1a549c92814ec59b6f4a613f6323a96da","afb93011c588026e497cf1f787ceeb5b6649b31e6634641609a27e4aae8e062d","e5a0bc7b21ff30aed1797ce39aed22d02815a1e80b66315be108775e1544b3a3","7e4fbe417948449573fc77800e3ad16ad3ec0aff2cd3ee851e7efbcec538b2a0","8e7ffde51b05b936a7eb5389106835ad100c18f24562e695d35767305911431f","3de80eaaf2dca32356abbcc46c47132e3d244da28ac1803f90c0600bb4f0836e","810c2b483236c5da900ac0ee9beef62cec7dbd9d526189df63678c5b7243b882","a3cd6a309f10748c6992d7d249a79b7e2e2669fa48a49dd673039acab527d8fa","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/delivery/en","quote":"My suggestion would be to allow testing across multiple flashcard study sets.","rating":5,"review_date":"2026-01-27","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.