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.

“The AI features do not work well.”

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 2907673729

Proof data

Record hash (SHA-256)

e708d924b90fe320458f85453375e6498a26059ddb6f63c54e45452b28a4f855

Signature (Ed25519, base64)

o7y9FRHIdbCR9lt4NQlBPxr0e1faTutmz4nAblFHF7fH6Ev7p7pjw6uHAEAG1LjZHqbdF10nIqF0yiSWBQO3DQ==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["e708f03c8c8fed9a38bdeaae575469ba9e2c5a217d65b7a152b355a7729dc339","bfd369572833dfa5f9e703d0dbd1bdbd48bd04cc8d19e2feee9f6d67978bb6a9","063cefca3308a46c3fa2871ed79a9f755ad00907588322b4a4404723171a86f9","674c8bf6473f6ed8695cc12fa32c0f7cc4f5002eb208a092932e2c29e65003a1","a69d9452bd0d8e3ada356b4bb5922d072c9a075b3a5ef1fe8ea69399bf9941c6","8b5fbb28c59f08a7461728269c1668b30ae9dac906e1c2028f2a6d7835960819","9fcb29afcc9b202a23295a44649ab3fb5b4e4bd4ca3fdbc2b90b04437b0543f6","1e03ac44d7f93915e00c0c734e7147480de2a90b76023d1f56a4ebd99466df89","34af747da0e2bdf0e903c7b10a119c73fb741e571778addf996ceb1145ce330c","042f0fec74521bc48ab41f2464714f41d7bee9882be5ad30840278c9559da714","bb894289bb71d3b696c9afbe454a75a78b206d9839b23e1a62e36de1c4316674","2d0841904d905b327cb803816e73e56fa86447bd28a90f792c27c874ed9a6b9c","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]

Anchored

2026-09-22

Public log entry

search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…

Expected log hash

bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/service/en","quote":"The AI features do not work well.","rating":2,"review_date":"2026-07-03","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 (b9a08f9d6d76…), 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.