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.

“the Proton team is proactive in listening to users”

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 3668680919

Proof data

Record hash (SHA-256)

0b9383976f837a04c3d2bb4fbe903f455194383b1ac45037dc3418e68eb48db0

Signature (Ed25519, base64)

/q9v8De4D0c46779ud3Pmxz1FZRjL8gN/TXztJ4FSaCSQN6iYdc9dST3j4aBQZOO5HFOxI5pcablQXyE3mCNAw==

Merkle root

2722cbf3688f456d398c2c349c50045e96cda26d0251a390f403bba716d64c3b

Merkle path

["0b910c538c7ddf7d43a8ee0cc48f8da75cc3577e3982cfcb27ba5574101d01b4","759b6043da7fda3ea6cb0ba0189c953bbe23b28b1f9d780a9c6c197af5ee4434","59c802ce21fee510658b1572905e7f9382ad6a5c6218c10e3d9992b17651c832","f4b14d5f11e1c84d93cb70734c2166b54e9ca21ec64b4467ade872cbebb4ab5f","5c699d3f9a881e069b8b2b03f61fb91116dbd9bef7e2ed33140676087e0aaec6","e862ec2dc8bef6cf19c178a91c7df2b8db5ec86ef97fd5a64409fb7a11c55a50","b92cf57e9dbb896acea4f4d83b7b4febcaf137bc397bb1da1f6d5093b347395f","2a82918207b68e11cba74dc01982af87aced058d1e5e33fa8b72cd90f38f186e","385e114f430f090f46cbec76fb954c21a541b29f7dd429a35a202229e2e9fa7d","e371b4e731cfddd5e7d5600b642cff649fad0301124bf7b072b7d623903ac5cc","4af332339a39e6ea76d62ed99c46c31598919e13693263cf6d909d061d8efddb","937ccf716598c310ad94912d78036fdd767f36111c011e345664249121f46a8f","e17aefbd7b422ad270c6969478edd518eb38d3eedab10292a53aa045165a0e2f"]

Anchored

2026-11-03

Public log entry

search.sigstore.dev, log index 3668680919 · entry 108e9186e8c5677a7c55…

Expected log hash

b9da8ea83055b2674fdcca0c2d48e6dc1984e46d36af8cf72ce2f4d2b7fd0005 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":"v1793706705310","kind":"published-quote","locale":"en","page":"brand:proton","quote":"the Proton team is proactive in listening to users","rating":4,"review_date":"2026-08-04","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=me.proton.android.calendar","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (2722cbf3688f…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.