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.

“Good calendar app, but needs more functions.”
Apple App Store · 4/5 · 2026-07-24

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 3101352376

Proof data

Record hash (SHA-256): 081dc2a49ef1566bf27173113f21c67f627e1ec76f5f7cf0e55d6d450b6423a8
Signature (Ed25519, base64): +mdsL8M/ZPjn1QCJQMo8hxm7Is2d1+U8SBCWTEPH0YfcPM4vik2DFTLwqB9IWWE8kg4IanRzLshzsrnvIDRwBw==
Merkle root: 3b3dd30c58213ddb8f8368232793fe0b07c54689d13df1c0c41d21cb861abb8a
Merkle path: ["081b12a0863e86865c7283bbf9aa18204f5d4fa379ef49532ae3fa70b9db17e0","32eb820658eef88945a8b4a3da4da8a0b94e642f52dfeecc9131419474811350","7299457c40e652ad09f52ae8b4505b75ab9bc95888f22477d584b81692088323","1ef1137a950c997059e61604fed1d70feda192a6e8e7db58c509315bdb8fb116","99c50fed15bc45beea729b5980a666933e3c2a6572d1bd4fa223e65e2bb17afb","c34f1ff0f4c2fc868ec8619178d2506c95bd6516a34f51c9f2a9c9815ef26577","707308be36d91cd9c1d33c311ee9ee7abf2a0270a954b507f9eecdc00978c967","dcc7af0b16f333b90cf47effe1fd095f4d76ebef8a29285e0beb2fa6c87de79f","8d5d6ee954150798f8379abd4a6c83a070a65b59a1b9d1542b9489570562ade2","394939ec4e3c2e1bac107bd71c3aba6dd6bb9390a3a6e216626c40cd435d41fb","3c178c871904327faf9ba5b90f3dd1ab0f571d7a45d12e87a39df01106784b4f","65013572e9ca7ff9342c630d7f7f6e23f927a73df0240e1f22edb004232e3e4d","63e3f1ca09bb046c49957a888858df57bd60020311126ac2ddcd851f6ec7f10b","769d32038885a12490c9901edf3eea3853f0bdf37913089eb73e34b2c0d79ce7","90aac0c0379b3865ec4b002eb3695dc461bd0aa66de2ac6c660b6e443865b70a"]
Anchored: 2026-10-06
Public log entry: search.sigstore.dev, log index 3101352376 · entry 108e9186e8c5677ae91e…
Expected log hash: 0a3f75a20ca5e11e6fd9d7b6a5afa175a84aab197fa1914018652863a1a64cee 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":"v1791258637050","kind":"published-quote","locale":"de","page":"product:proton/proton-calendar/de","quote":"Good calendar app, but needs more functions.","rating":4,"review_date":"2026-07-24","source":"Apple App Store","source_url":"https://apps.apple.com/nl/app/id1514709943?see-all=reviews","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 (3b3dd30c5821…), 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.