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.

“a fine comprimise for zero knowledge personal and shared calendars”
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 2524810465

Proof data

Record hash (SHA-256): 09b0a03e297d2c6695906db374a2a7b90b9a63da82ca038edd3e9e0255251bc1
Signature (Ed25519, base64): U6i2lLmzINiKRchiukK6wgELRqpncelnDpwyz3NGJFwNZwaZt73H4zMHyI3HMKpmeKHmRXea6+QfaB4buMFkBQ==
Merkle root: 3e1c67438f658ba7fd015e6979c1bfd82d90efb0848cecbd4d902d6b2ed171d3
Merkle path: ["09b0e6782edff163b3b85a353d50c6fc6bfac55428cac6096356d07272580451","8202d062424f11c98347da3ea23d19e55fdcd791e93b2c03e5e344b909501924","f12944908021840cd67fe732d8a870108d510df7b55874fc3d5e765cec294ce1","9f60370c4ec51650f6aca05a6d204d4b11b46afb677a82662bcf4df5d398a4e1","d2d5059dbcf32a439b15de51c763753d704a408d28495220622e0b8d26fa2b6a","5c45531354304286d9c42ac4e1cbea3cce4f8db2a6ebf8ce75b81475322437cb","0b06f472849eb8b6698484a4778fdfe58a8f3587ec66f9d33f8b7df874cf2c40","e3da12725f546289139bec1eae884079473478e8b4a3c7a32823ce668c52f123","3eb7b3ed5b9bddc33fda4c28fdbce11c2df14d266fd76f1f30a1a5bbaa3625cb","21bfd967beebef549712bdd5934300fc0ac86addf90f1223764607fd47af5806","aacadc64e7d7887ff88699bc333daff48d46b4e6179a20d2f7632f1b62733181","a84f19b73d0745b184029b69cf9f25565f40d942048a82955efda21766296b26","fb183b6f6365289d9e03a04ab6a5ee3d62de93cb7a6ce2bfeccdcb2ed00acf48","0790a9ec23117ba3e0ba9a310290906a4f1d2b0055d4607b106ab21651087c1d","db72b82118c1e08b77018004fa72584377d6eccdc4c75ec19bef6a78273f75c9"]
Anchored: 2026-08-20
Public log entry: search.sigstore.dev, log index 2524810465 · entry 108e9186e8c5677af074…
Expected log hash: 129b219cb6155ac24569a579c61e8fc9cc2d89305732944b8849d5e719dfd073 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":"v1787193927339","kind":"published-quote","locale":"en","page":"product:proton/proton-calendar/en","quote":"a fine comprimise for zero knowledge personal and shared calendars","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 (3e1c67438f65…), 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.