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 2893887498

Proof data

Record hash (SHA-256): 8bfdf097894527bd69e87e6506f7a8d1aff66c7cc560291e35e818094cb25e3f
Signature (Ed25519, base64): HybC54jyIR1AWPUO5ivfrbsWCFWq0Ug9xSMYc+V36X8wjuNWndhw9rm9KzWirL3PcPLxW7Rm9bAVO54y+rPnAQ==
Merkle root: 2f068f3de56bebe7a575ba4a979c9244445d2350140e36238e088fa40fbfdd88
Merkle path: ["8c02f3eef7155464f75fa0ea737c885d7072db1a895c06482fb839dbe971a49d","37eccb5ba7239de0f841587d924484a0b7d48a6e4cea093d1486215ff64c2dad","5382d3fae1ee0696e8468dc8a562e0cc266f2aa8a81888e86faf540b1ff2e9b6","56e19b36bf1a4d86821cb328b463d2e4b1e4ad091a74b7056f190ca6171a84f5","72c8e0e98c6e68fa8f3d5fb1c28976ea2470d2fe437bf4a16b924ec4a031369e","03f259409b55ce460184d4f4c994525728938f0834e9b30a64d2d87209f88652","89ef38fc0e20549c48691136756d94e89b330ecc705dd89d819939b1925c22fc","1ce2902e73fdc67b3ae1838523f0d962b13f5e8623ac120c5186f255e6e9aba6","b9cc5a722074edfb3d6354cbbbe63ca7226b6a9679297d9bbead236c41ef7539","d7eeade0a7c15ee87e37f90a10c6b913b3c2428b08e3d5fdedc572facdb30dba","623597ef2ce9bcd46bb44763a3be78fb59d6a1dcf82cf69ea6811bf87180cf38","92f17c43ced63f417fd8220fb17fa3f7f92ab71fa17571400b752b0983c159a2","c5d2216bf0003f30213891a39e09a3edafbc50505093b2ae98f61a9c067b5a3c","f2c4543851e26fd9d1e3721e592d66b00f142e537786e975d115c14b9cb61c0e","98191c82333f4385e47f318835e01d44ca8835262c6d0df40edfd5f6a4dc5c19"]
Anchored: 2026-09-20
Public log entry: search.sigstore.dev, log index 2893887498 · entry 108e9186e8c5677af79f…
Expected log hash: 90099e0300c6e23b62e79318296ebab91bff130379d248ada57f044f77e72ccd 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":"v1789796056710","kind":"published-quote","locale":"en","page":"theme:concordia/quality/en","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 (2f068f3de56b…), 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.