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 cancelled the subscription”
Google Play · 5/5 · 2026-04-21

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): dbe68e42ce557fccc7e09f81f3b7cfcaac439199bedd0135f8605fdfa3437dcb
Signature (Ed25519, base64): iBXZ6W5JnK9870cmymbdnQ03PSiPC6encLUbyOUojctZIutigVmI1CmTjAp1CieBVhBnkxHLP6QTbux4jWDKAA==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["dbe5690857a16491519f7386475354e0ddd522e64b0d09fd53f11e09ecedad5f","848c6a4dd79183a3477cb043426b94f1f02cd2c0b7a33b2c70eb1623864756ed","3deb91f9d014797b0fe6410ebe0fcf8eb4ed748e67ad7eecfbe26ad850a9e538","9739a998a7edc792c550e4b35bd1f8f6ed7d4dff3ac88c971b06244bf57480d8","b0bb787cb99ce26a0b50606a2d7d6b7787dcec0fa6293d3215b8caf1d814db4c","a4dd1a484fedc5e57451988ca99da21c6f859f69f1c346acd01237e91b9909cf","24f4031446430f381218ad8f4234ac0accd16b5fa70a792b6e576535a6f32769","148b0b37a504a3cc159211b684f02de46575e1f8ada999e1f9e188b7c9e05666","b0f0a9eb34346e8a75d2d80f7ddf7d187698055fbeb43515bf8e00cd97b70d9e","2bb5ff656c7973cdbf520df3c851c90c28841be839fb931187a0faf4b7c86f3b","d724de4db852592012d7e350c865d36fd56f7f3bf918292f4d807bd4b562df22","2d0841904d905b327cb803816e73e56fa86447bd28a90f792c27c874ed9a6b9c","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/returns/en","quote":"I cancelled the subscription","rating":5,"review_date":"2026-04-21","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.