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.

“Can be installed on Linux and all other operating systems, including synchronization across all devices.”
Google Play · 5/5 · 2026-08-13

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 3665856061

Proof data

Record hash (SHA-256): 09c03ae769db92066dd0c2b40b24fea52c95f2b0f88a25a5dcac948a3db363a0
Signature (Ed25519, base64): 0sb+5HxlYmAJPNFUfCZpEJ8O8a12nHl3qF71D1N0/01JxJjr6FEWwCVWcXxL7SZYSk1moIxCogTiDE9tqwxSDA==
Merkle root: 30e6dec0d0882018a3e7bccf18a3222b7daad8045915eee7523618b7cf75b77e
Merkle path: ["09c0cff897e2dd270d6c9072189a5caa658df0165fac25cb3c06e3af834595b9","48eeaa19135d5f44393a39851c072603739f0c84d22a19ad75415509bed80a8e","96fb4cdfdc531d8d425a0629e7da3ac7ed66aae373690df5128bd50601b78c81","3b3de49c03ae71864f54a5ba96916fd3ae37410622cb3267f747a63eae2afded","51e8f6c15196153fce97a3516d2473130cbf5ac48eb568925f7f7bdc4400aaa2","2c9099233cab3112e327e62b4db50b9c075823e955a377bf741a3bdc9e0c5d2c","128282b6f10310ade6c2c887446b8ee4f3f6839e4c35faf61d733f7038d6256d","fa12f1cec5a5df4f0cfcefb5e5fb8c7da9cc12149273629a43509ad6239c478f","a2493b5bf3e0c12206ebd3d497f2f48643d1aa8abb29dd504a496f0ff5d87842","5118ccf7e815cde83a7a81251633fabe8fd16f8c5ab105e15b1895a648804182","7fd72173f45524d175f6c633973e8c30e8df12f70bff21bf410e7b33944e0ead","912fcc514d19cd9cbe0a1b4ab754d197504acd67486645ee4aa172fb248dca00","46692bc80fe953f4d8d52179b535334176c04357301aae92a75d811dbddb72b7"]
Anchored: 2026-11-03
Public log entry: search.sigstore.dev, log index 3665856061 · entry 108e9186e8c5677a72e2…
Expected log hash: ffc1bb1abaed68d6145f4de3e9055a9ceb42d7f5a099d941c361cb153635fb0e 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":"v1793699634728","kind":"published-quote","locale":"en","page":"brand:proton","quote":"Can be installed on Linux and all other operating systems, including synchronization across all devices.","rating":5,"review_date":"2026-08-13","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=proton.android.authenticator","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 (30e6dec0d088…), 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.