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.

“Ein guter Kompromiss für Zero-Knowledge-basierte persönliche und geteilte Kalender.”
Apple App Store · 5/5 · 2026-07-28

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 2631896876

Proof data

Record hash (SHA-256): 085fc4de58c71c559983bf7fe620a65edb909756ac100f72ddec6ddbd76d8d33
Signature (Ed25519, base64): /Qe6UkDONqKSdyYgTtF+YLmKArx8Qvk7iVSp6Rzbut2kqJEg2smybgxGKcMDa+Y81Fqoa3LG02sJwKj+CLfVAQ==
Merkle root: 4553ceda64e0f7e200f881e3be80f06ad7ad366bd41ae2637340e201b97fd992
Merkle path: ["08625edca3b42af978dcd7bddb00f99b3f444c8815333a8eed14e38748011891","1c92b931662b68266dc3f72df8a1b83bb26e589e8e345a03a1c57cad106680bd","215b6d6e494600862567084db8ed1dfd4dc24f4b89894263b12812e8ebaf3a42","80fdd9353a9e7350ffb2966d756ebb70afdcd90024061069020777cac057f166","a133bbc621cbba8746f68c44c584efbe5a0a8e9cc1f5091e21895e5af258b802","d4c49620c42c6ce7a62880d9fa0ff416be703034b6788270dbd17c1eede008f7","d0979bbbe7b0c0abdde53196c9e0c5704969764da893f6ae056b404a9dab026d","34d76086d31aa3cd7c116e30fdf656182a9ab4bd57a0607c052bd3efd78e53ad","5306a1d03427a70f219bd66d166d86b159ecf48c130f7a684a818e7fd5d3a129","c2c73697d624f69da5f5d439ffa13cb5b4c4a27d23898a0b75f9d91be3769ea9","bf907ab4e3e8bdc4fdff06792edd0cf49bed8f19e7ce057c3d16888d39ddd9fc","f9c3d44efaa3124514ee4c64b3279841948ff3e6efae5d5c9176edcffb63b0c4","1b9ac25bd72956239649fced74f841271bb5362800775be62c8a4c65a89114b4","198676edee22eb362b9f42be6e45e0c6688564326d7ac8c78c49d4b535692f55","a8f2b1eb226c55ba6a50b4f9e41f7daf82ed22f31e84ebf68e8ca69f1d094df7"]
Anchored: 2026-08-29
Public log entry: search.sigstore.dev, log index 2631896876 · entry 108e9186e8c5677a5ea0…
Expected log hash: 82d6416ccfaae92d072047c1941611dbdc6106e011bca285ba92fc51ad50f4c5 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":"v1787970342088","kind":"published-quote","locale":"de","page":"product:proton/proton-calendar/de","quote":"Ein guter Kompromiss für Zero-Knowledge-basierte persönliche und geteilte Kalender.","rating":5,"review_date":"2026-07-28","source":"Apple App Store","source_url":"https://apps.apple.com/us/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 (4553ceda64e0…), 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.