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.

“it also covers strict reviews, which are perfect for exam preparations”
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): b021d19ab62578b91ad89be7e17d41b82203926dc5957c47dd88184e0187108c
Signature (Ed25519, base64): l/FJIFMJKU3LGRhmgz193XPfECscgxZu3+fqyQiFdao2iCO4t/9YlzK+cnUxPzlie3SB3GgsyYsocaRxR0YVBA==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["b022acb1a388da0155548b84ce19ff26959d2a13615bc0f612434d5071c5140b","83b135b773a024efe3860d10ff53941b6a2291be402e522ffc6291b506e52b4f","6aded5a46354c30255f618915bf1a0e0a710418efc0ee651f380be2d9517ab3b","583ff4e44d8c9ac661002fcc80922da2f65979410656bb861df2c7c1f4c10d54","c51fca8608ba22f61ac05636fa17c42e9032ba9125182d7e6806a26d2acd6868","117afd02f07a1948e42a338f2899a36f7afdb47bdbf5d640b98103f316e0ebae","14a00e80e88adcf437197c336cc9bbdc6cb29956fe1a7708bb71b13db1081f7e","5b9ee1f6d230946f4834b2497238f027839037d1903db0fa7a0fb919cb67f289","85ff150ff75c780c74f98ebc9eec869687ac295f72c11aa64af2e4bc98bd73b6","aee526ca68fb9c032a3b580add14b26fe8d48f9f145846929d1b286460178d66","302781f826e4e27dfeeb952369e37835d487d944454c4a4129ac11187f525b5a","d0e82af4a03d7591b930166e680788d40e9d0f467d2d9124361d17c683e6610b","e73087a4c89fcbfd62483a37ad723e600377233e603592ed8ad92c5db69f30f2","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","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/quality/en","quote":"it also covers strict reviews, which are perfect for exam preparations","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.