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.

“VERY HELPFUL AND IT HAS LIKE MINIMUM ADDS”
Google Play · 5/5 · 2026-09-11

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 3273174405

Proof data

Record hash (SHA-256): 2a9f4ab04ec2c81d26c08ca133cde41bd6bc48e83c1a599a7f2fbb7ee7c176ff
Signature (Ed25519, base64): bc9TzCrCNLwb00K68cXUn4i0Vjw5/TeDGOQPqA6fxehoyQYBTsxtj71rW+3jtgnQNVzlUv3qPer3MIr/mDdADA==
Merkle root: a69839899d35e428e965dda22faa8c37ab9f1f9e8354c5c301a0cc1dd97ec994
Merkle path: ["2a9607f6b0b82ed10af45ef0d12b03ba9213d73cbf3f8a042dbdc36068cda000","bf0c549c4765db88c55149f7ac130e73e7a3e0007a22cc5fd4cdb1b13d34e79b","78aaa7f475e48751b5d2a6b16d9f7745bcafa78f8dd01864b7752a398a937fcc","6cffaf2517f4da168e569d10cb3b7a6f695d95e76441a32238fbb8a056ab7b2f","e5787971fe33e6aa9cfca17e2b033c9747e9d226f33015b3ef74d616d24c70f4","7a3a2b94dd46d4376cb1d2fcdb53b2a19ad14538c79854e9bc3c4d053c7dfc1c","7fc936fb29eef4f552955499d4ebb50a3b078f2bdff89749bdb031edd74707f4","645787616189db8b879e8fdcdc9d0404158bfd7f4356f3049ac4bd993706257d","75665863b96a5a34f4fadde5504737c9523f3353f76471e0018100dbd94bbc14","cfe3fe365877fb24cf034319290259aab08ef180c1bc00a5c3ed11834730d507","ff7277eab9fccc1be5838f9d5ebcf9f1572e84dffe953d855ef70fe521412a13","48072dccf34406d20883cec701fce66bc2705f5d4c15636c2ca8b10cf03adeb2","c91b6bd41b0d77873850967d2a33b58afe5c9b2077c41a3bc5e3eb1e0269e91c","baf50621c43237ae6460207428b54bf7432b36069b72ded7c303da6c80c67c5e"]
Anchored: 2026-10-16
Public log entry: search.sigstore.dev, log index 3273174405 · entry 108e9186e8c5677afa7d…
Expected log hash: a8603da072baf84665c1f8a43f623ad1abcc708773f195fc7b697ae45f09c136 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":"v1792120797404","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"VERY HELPFUL AND IT HAS LIKE MINIMUM ADDS","rating":5,"review_date":"2026-09-11","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 (a69839899d35…), 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.