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.

“this software works very well”
Google Play · 5/5 · 2025-06-12

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 3272785693

Proof data

Record hash (SHA-256): 8d69657998998483eb6459c20f82f05d9d2940e17efe18af51cf78be23f761f3
Signature (Ed25519, base64): Fu0BBu5bMur0NigReopDOwXWhged8anPNRtAN1VXKQn3433+N9cQ0WyOVlXckDKbFl2qbtc3GPgvF6FaGXdoDg==
Merkle root: 42ee8ba4b974d737f78b7f168d0af8ea0510697ac4ab4c6db44b5522bd195660
Merkle path: ["8d7459f0cbf57640ae8f7f47bdad0b802d8a68bd6270d47a0510a1fe163bff4d","ece3fc91b5ec97c10c81eaa7beee4f52e3691456fc1b8b858fbc00a189efb43b","eea0d21e5e7659ec2b0dc5e31411435f8975aeae07fc9cf60000ca6dc6ef29fe","e22cc114c6f1ff9d45a6c79abd44ce984f987b0fdc5bef6f8a823b5e410af442","37bacff38dd38aa067498e8e475f74089e75b472483b47edd637a1e45f1c8713","e81eb45d6cb27362bcfd86d8a9252802a495f2886f06cac9730bf997fb2b54a0","589dcc2c400add6ec078eef9183a3ba3bdde629a2495fdb48941c7368f62f29e","a42a6e30822c5f91e5e6e9a23ff089e935fc2909a32c8fcb6734a26f44b15d03","500809865628457ce5ff51ae644f8b95f030e7154eab173a4d00fcdd6b5291d5","520014f8008e64012df0476df5a3d7c504bd0cbed7222b6e5b4124691128db90","3063406005c4c2cd561ee0e446f82ed3090e73e2f1bf7424a6d013b0401df188","b916c7e35a75e421f166582b3f6908952de004bf398f5b3e366e009e475beb9c","31ba192f0d497b013b1face60fbd76eec62678c2633b6408daf0ef494b25d9a1","c77ac7da32c6d4db47aeb73e606322601c1bed1566533de53bf56d1599928d0e"]
Anchored: 2026-10-16
Public log entry: search.sigstore.dev, log index 3272785693 · entry 108e9186e8c5677ad5db…
Expected log hash: 3b93391ec0595ab5c0ff73f2540eb1322f56c3c1302e6789c57b97c74423deaf 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":"v1792118508353","kind":"published-quote","locale":"en","page":"brand:concordia","quote":"this software works very well","rating":5,"review_date":"2025-06-12","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.concordia.myconcordia","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 (42ee8ba4b974…), 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.