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.

“When I try to log in, it just shows a blank screen.”

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 2904877428

Proof data

Record hash (SHA-256)

e87fd091968034699b6803a4279d178a339e5df253f08a687e14bf2a368ea409

Signature (Ed25519, base64)

5iysXorop0G9+D5ZrCPm1uJfSvjC6J5u4HZVW9dNYpeltpttqk8SsSWhFv57mNbUZ5eE2alMwWD33uLuwneJCg==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["e87fa36e52e53c5e78b70af06f7504f2842d979a8d6c3a0779f7f804a2a8b0b4","137b59526411a66ddbb1b72293900954ab2c44419eafe8609bb497d12483569f","e25ffbed8cd85d72d3e790a793281e0d620750ed268f2ccbc3e8efe914543602","e6408b2d106446887687972d2385a1b34f2227c29c0fe315284521d71fa3b8ab","9713e1635b321ccb50a216ab453606f8f3d6519a1aa6e239f4c2c7526660b84e","58d0c9e2efa7599ecc18528d7ca1c00ea3f05a52223ec5ff4d47565cac846245","b85a108696b7e248af57b12c613409ce3bd6ee2b505fb3645db43618a1377319","b46c4d277567d5528c695d4e4370ab37ed21d3b93f452b2c7c13e472766d84de","631bcb4f089608ae873cc828a634358b8eb7bfbea66b5d560e711fb4962378b0","85cf02830a8d5647a5f7705ff7da2f830a119ee29dc89474d5bd79676cc972df","61847aed1e15fe38603f3749ed4f967e83902fabcda16f828dbfb3db9a44d565","d28ed21d4373cfe7811429a5d4926ac987665261fca2846c93ddc2c90e391266","f95e3a68f572f5650a4093453e2bf28168547fa91a01ce08e539b3d7016a3f80","53a8a23597d45564e495678bf6125e41ef42f347693c924494330dab53ea1e2d","2a462314156907e42d6f0d96eed96123f1d79516aef73ed189d9f5466556b638"]

Anchored

2026-09-21

Public log entry

search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…

Expected log hash

d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"en","page":"theme:vaia/durability/en","quote":"When I try to log in, it just shows a blank screen.","rating":5,"review_date":"2025-06-18","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","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 (e299bf38720a…), 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.