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.

“Used since 2017”

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)

6fea0f24d67932deda3163cd05becb807af607664fcfa4d2b7742a29786f1b4a

Signature (Ed25519, base64)

pXy7t30Suyc/t2luC0K/kBRfIdiPCtSNRSdae7utd/NN0AijlYH1nFAPTDPa4htFOezsOfs4nvq7prghgqgBCA==

Merkle root

172a3e0b3c9f8b02f52318e01ba6beb899404e00e91c15eebc4dea38467e1404

Merkle path

["6fe9625b57f8410cbaef83c7fd38a57e8dd48231576dd991803572d2fc4fd9a5","7c35de18a3a931e60f309d9502662970b3b57e9b6bfdb7239bdf1edec13b3e9b","ef1756d06b734407c470e1736df794dd1a68adece4775d848c7fcaa13800ad0f","ebaff24fa283df011fa30e5906da833b7fc81f403b86d6ba7a6803fc7c26fd32","c15521e4220fa796abf737b880c179a477600d3b8d7758434bd358defa6ec984","c3f5cb005388f3abecb03601f598dadb42e4bca50cc0bc386d95f47a2a68e37a","7bc593d24fc0248421defb879003cd0d9a354de0705ea8088535bdbe97ea7e21","9074aa62baabf6b6894084c8aeac270424946ef789d8ad1ddf433ab23619212c","6f626ef5d46c6ed358d39ee240c89aae2a35b4278a47aa75363e5c9f34b0f155","05036fa09b9056858e5f1ff790242f4c80a3642df58ed73311281590d5a04bd6","057312bf19bec52eca79696833e9284ad3e97909571c00140a1555d6764df41d","1f567a3fb36c78ae362612f4c99cae95ae4dd4ad0c6c633328b659341fcb6d94","f12a899e5c92b32cfe903fadd591410ed4da016670fe0a40b993afb550e2e37a","cf4d3887edb33be9d7a9e64011338d9abc8444e06d1f5332550f7686a2c1727d","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":"theme:threema/durability/de","quote":"Used since 2017","rating":5,"review_date":"2025-12-29","source":"Apple App Store","source_url":"https://apps.apple.com/us/app/id578665578?see-all=reviews","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.