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.

“Thanks to its explanation of why you are wrong, it's very good”
Google Play · 5/5 · 2026-07-27

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): 4b60958fa8f6385df04541dd584533e2435b65637aab213e246bd2938a3a5bdd
Signature (Ed25519, base64): hw4iwUrMoITsHu7dJbQJz/HGRuXvuM+RJEOhAgQ+bLwDgxmm8D2MyzBHaLixboc+fqeEkAgiHOIPheiwFY15BA==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["4b60ea187d62537feaf2a1d642909525d4500584c744f953eb50082161cd3690","9686e610231639c3f49707be45b31fd0b88432d48c5e9540d4f5dd76a92847ef","0587ff72635eca441b74fc97c8b4416c8b3f6069ff3b2ed4cf6640a030c69851","829fed3c90b0c11fdb1e8c17fa96fba6601746fe0936f540e2678850ed8a8172","c7fbf96d296411284586b2c288d524b6c89a3e0e6833acbcca4432646fbbe804","4b8bb42ecf997550d0fc5d3e6a435e788507f882469a22c68febf3ed549de2b6","f14ff5e0a1ffe98c37d64f365128552b95a8e5d422c84e8b32a0bdc216e99214","8b84a840bcf1103f369bde9c2a3f1e00932b73a19b541e3891b3774207f5ceb1","a1f58d4271dc28aa78e348b18311dd2c53db5811e81172d4bf835e83b002bc14","d79f3d0479c675e8d87cad7ff3688260e6e42cc3d4dbdf6e33787a17fa7cc25d","7d0a97ae88d1ec4b960642b3dc54d0419bfc6e1cad0abfd4383c77fc83cb691b","0197d988959ac12f7d8946ff2581c88b7ba9a4305193828cca53fbbb9832a064","bcc0d977b8ab2060a87584efe5d0f5545e840726716d3f02c248db108122259f","6c299608515c69a03540be35865f96ca4932f3e0403f8f39fb0e1c2e2aedffb4","43a562d6822dab12c673c1efa0a3171d1ef69b949f676fb01847e1e5b56274de"]
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":"Thanks to its explanation of why you are wrong, it's very good","rating":5,"review_date":"2026-07-27","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","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 (b9a08f9d6d76…), 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.