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.

“auf dem iPad Pro ist die App nicht installierbar”

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 2543025731

Proof data

Record hash (SHA-256)

15eafd81297f49c4d1770fc489f281b3ea2383f087b721f96cc6f7f70aa643b2

Signature (Ed25519, base64)

pAKRQuudxXEvmIOMaJDWrKnP3lY66S4+muGx4Lftdc8tu1TGG3p6kxxFlV2UdYVn0o2C4G3fAQMyUx7MqqSTDQ==

Merkle root

172a3e0b3c9f8b02f52318e01ba6beb899404e00e91c15eebc4dea38467e1404

Merkle path

["15e93d2ef94192d956161e313f8762ca354f4c4475d7545b3e66228e7da9ffe1","69965fb188db11252ca1de417a32bbff8f63e3167bb61729bdf9fd90432c7d94","48a5cb4b9984f02ddef26a761a996ea2cca74c88cbe284f83e8f19892f8d98fe","b22008b4cd5adb538315fa69528e45d72bbc14cfb7a84d9de7bcec2457086bbd","48390cb4f646f84a9af2b30c629a50ee051af098c8714b114dddd6b46df25bd4","38bf24d8ad37b4155375e35a2a4707ea1c382769a1869b65aa8a023bb98a1925","76d644d9a89d104cbfde8aab77780abaeaaca504771d2cfbcad4db56d4260437","67f3b2f7bf472b0e59dcd12026c4a68bae54260f0939eb8f37b4c6dfc9e3a2a3","89a9d5ebd133c58fc7babc3b5f4c6ffc05ed8db273c156b93bfde9c9cf76f2d6","d494e889799d389af0bd66fabe5be27d9c813f36d16caf5b6471fcf199a71ff6","b9f941e6f506f26041e061465870845d16c7c20ff6defa76d5eb1ce53facfec2","589c22da96e3ff60efb0f79f96ffe7af6214e9470898a7edd786e91a2a5cbbad","6582b4bd72409a5334905e80c9e3aeb7c43a20c5eb4c139595bd990bb777102a","b2e250a62b44b0b9c303f91afd3aac8852fa6af504d7d68ed736141a3dd71161","7731d0ded4f51d151ea3e84474d1e27a6279e8756420c93cf5fec0abf7f11add"]

Anchored

2026-08-21

Public log entry

search.sigstore.dev, log index 2543025731 · entry 108e9186e8c5677a8971…

Expected log hash

19ecbe4a66d8adbd7c6057dbf6ed9be73485c248dba1e0c595279a908b3e8bea 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":"v1787283443958","kind":"published-quote","locale":"de","page":"subtheme:proton/ordering/einrichtung-konfiguration/de","quote":"auf dem iPad Pro ist die App nicht installierbar","rating":2,"review_date":"2026-08-05","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 (172a3e0b3c9f…), 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.