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.

“Bin sehr zufrieden.”
Google Play · 5/5 · 2026-07-23

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 2542443729

Proof data

Record hash (SHA-256): 64d7dbdf29d0a25c0fc956a872f5e56bcf9453e1872cb25aa86593e540859335
Signature (Ed25519, base64): IqmD6Mqkr9j+bqwey6JPdalKAajftKosloL7YSRKcJCTp8KXOVwtIezXk4Z1zzaj3jPRY6c4Nmrr6BJ2X0gYCA==
Merkle root: 4354cafe0e2ee66c200238a4bfe005f997e761de26d9e528ed6c12dfe1b33129
Merkle path: ["64dc49f7759827d673ae41b3295f3e4b5bb5f5bbae4dd5ab09a07072381d3192","4e93e72e8477ffcfd4a2b0ca9623ad9fd3fc63e12c37430fdf3bea40d62908a8","e424651b31e9a5677284dcd6ed9aa646328dbc0251077d8a44934604d454c82d","76a53a74f7e3fd63f0f9bb8fcb61cbef4518e22ea879106b08ff4da4ddc519db","ebc3b6bbaedc61cec8a0a2819c73a4d35e960fbd753a1aaefe6ec2cbb895971d","634ad557fb1a1b647d4f6501df708865f703d0365516147da6734500ed09c8fc","ddd760e265c87fd16655a3fcbd749e10e1b4f5aa6ac5d093e0e369a826e71750","dc8fd9ca35bbe47a6ddd1a83b38901ffd81ba15e9dfb71bf0a4a3179b367282d","bef291a2ca04ca296c2858e0994556465a640eb57b2e101a6e2da33cdaf6b23b","715d12590655f22f15948c7fba4939a5acde60faeff0288b06b0c17d67b51293","acd60d51959d8ea241d4cec578f498e04889a18ac38027355c026f33e421b596","562094a4371f74846c5c87c1bfbeeabaa173cb62a761690ee55d6e20f604307b","58001a430d202986e5fa4168d8e078e3b00d2bdf639864028966a0604dbcff6d","eb13252a020300a13cfcd1aad747dc15bb314823d4af7c0fa17270669f143f49","16ed4be9ece293c235c5510e2cd19a05055f034548e73c12f8a9947de7b32591"]
Anchored: 2026-08-21
Public log entry: search.sigstore.dev, log index 2542443729 · entry 108e9186e8c5677aface…
Expected log hash: 1f12c9d846c7a9fd8aeda84057eb4d8f639bf78886a62c6290a2a60cd48e0812 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":"v1787280389476","kind":"published-quote","locale":"de","page":"theme:threema/quality/de","quote":"Bin sehr zufrieden.","rating":5,"review_date":"2026-07-23","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.threema.app","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 (4354cafe0e2e…), 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.