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 2680856520

Proof data

Record hash (SHA-256): 1981fdb0863df198b6addaad306eab2519a1be0d68a93891134dec7aa85e6d3b
Signature (Ed25519, base64): bMA2h2NHNtUFEsltqnbnc4BFAIcHmcD2MR6N0eQBE8xw2LempnCyJd/C7fEXF5bzrBl5qEHO9vciwV6b0nE8Ag==
Merkle root: e42defaa0a17e226699ea4a82dc9c6dd27c28085170ffe1d62d8c6a4c9215db9
Merkle path: ["198313a2317964b2366447eecfc907e92f249aa9b0a89a1ee1515a501fa3a8ea","9371e58dc895ca886c2886a269383898de9733482d1efa7c8487750ec0f21266","a4d5519ddd6d798d6c64677d0336a3856ee0e73e08ec6c5ab0d726a5b362d12a","5dc184aa35b61e07219a5e2e1fafdebd15c114f29ee62b71152b2f321454b48a","108aaf67f582bbdfb328e7a57a0463c63cbf484ec6161ed032bf1c3881f13670","e4065295ccd488ec3949069eca67b48185f4f8afaec294f04b1e86cac2aadbed","5d565c7335e77b3a7fb788b6db42d82d190489b384a96080b1e3c168819f8183","71d097c5244bde41f09a18ad65941c3568637f55aa0ed505181b2188d24bbbe7","f4f5a9b6091d4f4fa2e72d22af1c3b25699a1c9fabbc3d6baf464c1796c9db8d","68066f33bbe2763b98ffb0d8c066561b40d0537e31a7903d8b43f2db59da8c34","e8bd0da09216d62c1a3e885e7ea71d7764454d65240ae70c50c6dbff49b05d6d","264c6a01e9b304e4f581c4bddbe0a41be707f411038647fc59c30dd7bbd1d93c","a723e3192c73ed0856ed765177b67dd95561b4a0d6d1c0b16f64f339be4f05a1","f9b10a6aa616ed717dd3cacc1714fe509709e95281fdde9fabb8c6943e906d5b","270a8fe791f18cfa20f43263c29329704ffea666703469cea18570c7ca1219e3"]
Anchored: 2026-09-01
Public log entry: search.sigstore.dev, log index 2680856520 · entry 108e9186e8c5677adb25…
Expected log hash: 356153ffa6072187539ea75dc6dfb23d03b74238aa8aa70cd6aa9a6a99e983d4 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":"v1788298923475","kind":"published-quote","locale":"en","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 (e42defaa0a17…), 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.