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 bietet mir den Komfort eines digitalen Kalenders”
Google Play · 5/5 · 2026-08-11

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 2647504463

Proof data

Record hash (SHA-256): 0605c0b564f4eb17fbe54ea587aaf1e9cf98a120974fa152628fb363a7938ad0
Signature (Ed25519, base64): tXKUMFYevUx4dVmJo3AzkpWlcGmzH3NP9DlJIUI73Lhy3PF1xIwgmxVFiHjliEm27RofDrEb/G28tEZQYMZ5CQ==
Merkle root: fbbe54686ff192def9dac89bdc2006ad47a493d00db3b3a9ff43e3b123308061
Merkle path: ["060179a60194cf29bd4b898837cbaf450fe1a00c4206907a5b30e49b6fac0b90","1b1cfd26cc1f579523843b563aafdc10f53ad21472f05b74b7f3c661d7f473ea","3304bbc63607608ed056d996102b0cc8c333f079d8558e76695ba775feb62891","bfeed72cd84a0d1b2e032b537963dc1ce144725a76afc68688d08c4b97582f55","99b4b4178c066aead7dc23cfa5507a48cbbe4a4525d0a03ecb000b7ccdbe1514","82d77857197bb6d1b3330739f7de070f7fe152058acdaacf6be8d524ecaaca7a","725b2b536a0a16f444a7ebeaee89ff4e62d411ff2f507c7283af0a61f69210ae","a897ef144d75a1c15a06ae3616b6b65702858eebe91857a6817dd8439f949cfd","791bcaf4ba9102d116b1644ea297c85face6a758bed991af08f9db535ff8ab1f","8b84666fa1d40da1ed912de4561b19eec3f12ea1525a0dc1aa884beabc6fcbb6","038baee668e0b41961ae31c6eb9cbd80e2f8e2c6516c288f842eb314a3ad44c6","81209070664570597e8bf61666e34f9722287e281f0452904740719a0e227776","625eca1bb9e6a91dfa6035d766ca1bb6ab8a6b58b95ce694996f607f2e15cc42","924cd389915044788bccd2a79bfcfb29ab0fa44adbc43b1e7877ad3c03c87c9f","910ae6498c24b3e218a7772cda41516322afe32b5ccc8489f6bd972bc23cc14e"]
Anchored: 2026-08-30
Public log entry: search.sigstore.dev, log index 2647504463 · entry 108e9186e8c5677ab12e…
Expected log hash: 3bc4a58498687620ad93cc1fb735b54a6af64886697db4c643becfe466e70236 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":"v1788063157670","kind":"published-quote","locale":"de","page":"product:proton/proton-calendar/de","quote":"Proton bietet mir den Komfort eines digitalen Kalenders","rating":5,"review_date":"2026-08-11","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=me.proton.android.calendar","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 (fbbe54686ff1…), 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.