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.

“It is superior to any email service.”
Google Play · 5/5 · 2026-03-23

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 2544092674

Proof data

Record hash (SHA-256): 2a5e16b2a1f306c485b37a441f2bd61f89f822becb665101c89a64d62496c445
Signature (Ed25519, base64): KdE8vDrVqN88jawWxq9XH4TqPrzDPgHfX3mWObf2D04ZERWqI6HwvBIg8YThhhxiWggYg2OzU5sm45wW9L53CA==
Merkle root: fc0474f2ab9253f8c52a81a0b2f1ae382f5f022f9b54f4e3fe06eadaf19fcf31
Merkle path: ["2a67858618e7294788aabcac79e00b09f55d10688c46c73b1f06d43aa31110ea","0eba5f06eb0d85e515e7b33038d9b49442b00b44645706d2899813f6897d0fb4","e159dbe1700e997b011fcbcaf41ec8fc77205424611b2f5729cddd7cd04deec9","9a6095ae8a944e868e2e3a28be913d63f17ad2be26f3fe2a708fddc40d0de303","a738baf4605abd9cca41cedf54b6242c4be6d13fe8c69de6d849a12e0d166635","52f082af28c4b3aaeb0b3988cb90ac7590617964e98c490d58d486601a0419e4","920b20263ce0053e09259afd0da904bed7bdb7da3ee8c675afe5dbbdeec1e57b","5778776aeca8f5e6dc58345438bb00dc9225c65e2cc4cc4451bc3da27ca75703","bcab780afcc3691275b1048fe69f09e93c736e701e2a000dcffce761cc8ad838","d7572827fc272d396d124c00ea5f3eda1ff2151761d5f1a10b6902f9fbc9def1","c6da2c989800eb377bc7dd49c764b3f61ea93855f6e7d63aaa34034278d0de22","7e0fd08156d3507e2b238052bc49b842e577738749e0c25879dded00feb9d11e","0762348a28234508bdd1e30587d1fdc0dd40f0417d1221a51093b63a21a51b25","d53ce14c8422f7b98c01f3be46add79c44e4551711bc517ba367121540130adc","df2c1289894581f6e22c526afc719be15b70c61ef4fbef0978dff78cc8fc6054"]
Anchored: 2026-08-21
Public log entry: search.sigstore.dev, log index 2544092674 · entry 108e9186e8c5677a1b30…
Expected log hash: e3ca1014bd6a1a766a29da72cd2b9f7f9c6c416fe6af720fafa94eca555dc171 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":"v1787289954326","kind":"published-quote","locale":"fr","page":"brand:proton","quote":"It is superior to any email service.","rating":5,"review_date":"2026-03-23","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.protonmail.android","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 (fc0474f2ab92…), 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.