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 got a response saying a refund is not possible.”
Google Play · 1/5 · 2026-01-11

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 2907673729

Proof data

Record hash (SHA-256): d5bffc6b9333829f06ae12ec9099e1dfd918a483880f85e962c4359ac1cb6d40
Signature (Ed25519, base64): u0pu2qXOVT6Jbp8Tpi1cjSP5uApPnY6VGCGYdOjTDyQxj2iNcXQWSOaYkYCDUwFELT4ZQZv+4cUkm1KlSOcoAQ==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["d5be9958bc71bcade011156f2274a0b24384ce94c7d76667772de330af90fd6d","4675f3d108eb2ba71c762cbff4df169eb3f9dccdb5289a80efac4f5e2a471174","fc253e568e95e41496b25c66aea57a213215f5e2a981abb31946aa4eecf5203f","8dc8f46ed072d86987574bc535e24e1933c48cdf5d0b51137ec0a5b60233676b","8dc26dc1d6e93f012f9bd18877919b61cb68eb5233276e1eca1dbaaf58ad85fa","67a3bc30c1c19c3e1389a81c6dd546baa0d22b5bb61d28e01c6d6733ddaca4df","1f49c9eef122175d7e9deaf19333a7f5e5599d2cf9e24a379e0c4b143b7a8806","6bd8ab49e57b747774882c7390ada384d2646b5214a0345e2dc18efbf4c6bf8c","c27b14fdeb1bf79b5562d069eba04698422783d0cc9a6a8344db89736a205dc0","1ef2d32327dec49b078f60d82e96fe63ff04f9e28e1f6ac4531459cb8e763e04","5fa4d2509ac4b266680172a1d644b9603830e2992eb99b956b8d4389a86690d7","1324e7f8581b1cc3455b81e88efce3958a5b23eb7205ddfacaf930e32b10bd47","ff0ce3b59f4b6fff6b806e01d20d764fb2b7a5651693c19ab4bf8a8b5ce5f968","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/billing/en","quote":"I got a response saying a refund is not possible.","rating":1,"review_date":"2026-01-11","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 (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.