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.

“Von etwa 7 bis 19 Uhr ist die Funktionalität sehr eingeschränkt.”

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 2582656976

Proof data

Record hash (SHA-256)

07464e4499c088f21bcc314e1671df46c13f06871c3ceaef53b29d19cddb7a4b

Signature (Ed25519, base64)

+mkvSdlHLluaof0pjxpIKnfCy8SF2iVeOlx0OM4vpACNE5yXMJWzjxiIrR1M7sKORcloExL3JKM3Zt7qxJX3DQ==

Merkle root

a4c18639252762e8592e52699d716003f75d0f7e56e7fa6339035d798c5faa4c

Merkle path

["07482d20d0173aa7412a1160fa755ee6d3b3403ef00f687d4494f8a7947bc31b","a63544faecb4489e892c6c81033dc9c4a597e12f9f9924e443096af777a3977f","ae5d84dd145e2bcb3396ac6d8383889258aabed6847353c46d340db517f76f5b","300e7920c1b7f8c6de6efd3787301829cf1dcf1cbaaffe084a3134e9ad5b4855","ece7d321e4c83aca4497b41a69dc60723ca1b4ce41546211597df06bede55c17","91f502fb4be3d11de57d799201228c3ba0763ecba4f988af393f2106605de47a","b539fe96cf19045b2c715f9ebfc77c9fc7e749f05fc6e90a4bfcc4a03f6709a4","74d10b809d3af294c297baba6026672ae7244815ceb3a9b1415e7c0fbef5d3aa","ff608d5c97267f1edc616c11848bb190b18dbf3b79ff92a6389e6e609d94b584","0ee843a520abd0bee90a57da50d0b49f813e35ce9da332878af1194312c4595b","0b173c715a5f3084889c2022194fb83eb9ec0c3d79187995f69b3443609b5cef","ea39482b5a7e0d45d9fb3ae639170732241133dd31b00e5a83bcb03533f8d238","a54fc815eb1b1840822e4a876caf80ed05f30705f1d63949cf36ecaf8a968901","991436b9578e675394ec672133d1c374d83d4a1e2c908b8f139d4d517c2af4b3","38817b8565345ec373a63f174b7c8fd25668576b72ed4022ed922334dd0dbde5"]

Anchored

2026-08-25

Public log entry

search.sigstore.dev, log index 2582656976 · entry 108e9186e8c5677a65b0…

Expected log hash

918fc3881cd55f75123813e7996add0afe4b7e68bfa1a75328681c18d541d464 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":"v1787629605596","kind":"published-quote","locale":"de","page":"product:proton/proton-mail/de","quote":"Von etwa 7 bis 19 Uhr ist die Funktionalität sehr eingeschränkt.","rating":1,"review_date":"2026-08-12","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 (a4c186392527…), 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.