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.

“I definitely recommend it to the students who don't want to spend 4 hours a day just to write a summary of what they've learned”
Google Play · 5/5 · 2026-09-13

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): f5e0a5e107457271bb826bde6be112d6b5b9186986a23618edba601c92116cd4
Signature (Ed25519, base64): RYTaJXM7mOpvmN9Sv95vMF64SRrpC4mAYqZ1+bdaL1v7ybZoiDUMvXPhpr86ZgESsZv5gRBijIB6c1IALBjrDA==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["f5dc27cf5f9e3ce8a68ed096e7c6ec4fc0eeaa3709afd2524b71a54d62802cf0","398c2b1713647a3365e22717724a123ab0538ba679cf21d4015e8ecfcaed299c","35ee5ad2b958bf38f9f2d6d030b9e6d31b7ac3c581c9b895fef560fc4460d9da","a7cbce12638f7deec3ef4c523271d68f2bbb519aefbcf0a90d7ddb7240c2584b","7b48c30bc5e134b871ac6886d6d7cb42613e9345abc86db24e113a0394f6095f","9f81b5e6b54ea472913f7b401b8d8a7803334c9db162d8f52461af8b3a810720","7adf745796b666b14f5571d14594e39491b6927ba014eb978d248b0fcb0fd385","fe06ea7e1ca4013aea6fa730eab82f0d40bc8b4a23f1e81f257d5fa0ea116c7c","a73ddbd259cbf518d4ce098d1c42cc733a0dc1236adc531bc0cb5e5bfabc96bb","d32c39bad5dce323e576c283506b6fb7150c1c5a45bafb8288504a1620175dbf","58fcebd1d3d07f3a6ba5f31279f2ecf014cdac37bfe65872be1ec5d6a456940d","e89b125d6d75a826a464fa50668f6e82a6668dbc929bfd3fce7c23cc14adfdbc","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
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/price/en","quote":"I definitely recommend it to the students who don't want to spend 4 hours a day just to write a summary of what they've learned","rating":5,"review_date":"2026-09-13","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 (b9a08f9d6d76…), 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.