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.

“Proton Mail, unverzichtbar für sichere E-Mails auf dem Handy.”

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 2907673729

Proof data

Record hash (SHA-256)

0a1f36c2eb2a7dd2df639bf83836ba0e2a8e799a9113bfdcd1162c99823c33e6

Signature (Ed25519, base64)

x8R8DC0pyVpCAOnbIU96GpKKQW0qD5EgSzXt6R6mQ0DdfwvzFZpcAxszhpcwjuRJFgZ0pklJQkfRl0c/CV6TAg==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["0a23af4cd02f598ceed7fec4541b41df22b9c57dcf47d20d155ae18042e85cc1","a8152eac0f48fb21768025615f2291c44f70464b2d9eae453bf04954b5338986","00ba005af2aa619b4694a324838862251e52d6d97f5ad9f1630791b317551299","48fb7eacb5d70f4a051b964fa8cc11a5a26a5cb086713a4e789bdb0faf27f002","960883efcd2e4c8921d5de4798fbbb29343fc1fd9272f846108684ae9686fd46","c05099087e14fa6c4f1ccee231a27f8d1c92b3fdaf699cca55f87bddde313707","9200dc3c86a1adc78138a242030e4e22357124c1c4b5269f4b283a618103bf7e","8edc855151a3bd643cabf998ca8ba9c1dd422a61d5050345ef12a8d53a15f3a3","ba5763a90d12a099a011e943a792f87b5aedef02535875e5c1c4db030474882f","3a6e995209072b3e1600000c68578eed9a2f9191f024f1c2118a0da8f4e6ec91","d4471b161c87e50fd38951ed2e211fe04e6d9ffdda22d17889f166869c99c4e9","85daadc41544f83be69d5533c0c879f1f8a6b6c7e356bd7472ec3f624cd585ca","38643099e759f6b9db1dc190b469982c0e70d71dc8caac721f2a46ded3b658ea","7a4792c9dcf9466d19ba61ec3efd4f578e21f2d3035e8fa6a6264d3045083f7e","43a562d6822dab12c673c1efa0a3171d1ef69b949f676fb01847e1e5b56274de"]

Anchored

2026-09-22

Public log entry

search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…

Expected log hash

bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"de","page":"theme:proton/billing/de","quote":"Proton Mail, unverzichtbar für sichere E-Mails auf dem Handy.","rating":5,"review_date":"2026-07-11","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.protonmail.android","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 (b9a08f9d6d76…), 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.