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.

“You select a flashcard type, but it still gives you questions in whatever format it wants.”
Google Play · 1/5 · 2026-09-12

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 3247835674

Proof data

Record hash (SHA-256): 27c7d7e034280be78cdeec701c7d0b2e4acb315cc61d9712d5791a43362401c8
Signature (Ed25519, base64): lwfEGT+CffN+Sxd5NG77213uAgTAaynMECCt4bv3Uokl4K2LG0uVAN8/2hvQyAZIDsrV8LRl9XJ/lxOh9oYqBQ==
Merkle root: 8af5f2f3f65c47a75dcdddbf363e3e76b22d37f4e953d150fcfa3e84bb04dba5
Merkle path: ["27be8044a2221b02b06755e4a58ce3a64666af1b41700db7dcd24a8d4e8a8620","4c6d403f2bbcd6cc4b6325b33b7405bdea205239c5a66834299ba30aa11ed52a","42044347f870b631f4793b7fa091bcb936869da78fdf8660e458df037197af0e","fed5a8344677b47c8c49b48d630c0457a887bd41bdc99ebbb18c96b0b7c8d39b","120da72068cfdd2300ec567291fcddf0208191631bd046600e9ccc522103d958","24f639d1580d121d7e18687087f3550348fdfe800a39eab294833aacd61b8a5e","22b4b0d595cc5511d3671d0eca1ae115a404629751e05f050973266056b0a4de","b841e601ae7385203ab3e2c330d790674315f7445a8afcf72ed2c0463ece06fd","64b823c214f5d4dcb15c389bc18f9769dae0c41a0469a60f8461c4e729acf9b0","7a2b132917748c82f0f3df013e78a9b1ea81d59802357ae0ed170d5cafa2531c","cf3fd672f99fd3a12c561632c0bc7eef648128cb12006c0c959d1eb66b0780a0","69e0b278fde36472d775b547f81c80ab6a46676326bfbd973817b55dc3255d09","2df4d836b73633f71fa96faafac3d9d32f00951d180b99885afa9511763f7b1f","2212eb5ff51e97198ac2cd6542275dfcf712b9be9a8fab294a9bf844689bcee1"]
Anchored: 2026-10-14
Public log entry: search.sigstore.dev, log index 3247835674 · entry 108e9186e8c5677afded…
Expected log hash: 306cff230c51a4aeee6711c8f2603eb2af6985e8dc9f5dc959efafe3398b8caf 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":"v1791944613264","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"You select a flashcard type, but it still gives you questions in whatever format it wants.","rating":1,"review_date":"2026-09-12","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 (8af5f2f3f65c…), 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.