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.

“somit hilfreich beim Lernen”
Google Play · 5/5 · 2026-09-08

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 3199014646

Proof data

Record hash (SHA-256): 46457be00dbb5053b15435982657a7749ef50ba2df966db4050a5e3e19ee0651
Signature (Ed25519, base64): 4JQu4mDHVHs58egb+97VR6htb55Pu2EJsV8N5zE3YE3Jy2LzJ2B0ERhVhv6tDB5BREdQJW6tre8DFmC7bi6mCw==
Merkle root: 79268b3be1e951447ad916daa23d94d3a225505999279adfec84e5728be030d6
Merkle path: ["46472ad892adc2445f6d96b282cbb590b69548a20d91501541b821e5239ac8e4","5d571124580b3e8e5897c386c186f24c1732ede2f364dae59562449a81e44f10","6a331123fdd61c5caa81b5f5a0e979b7486f65d57670fce75f0655668733eba3","b80ce75f661fe423aa4476fea8e16fc159c8b5e298d9119a5a3dccda848e1cfa","34d79d13e72a53e03b9b723d19934559550524dedda70fef5be27835823344cd","76db518bccf97e654d86020cb9b2cfbd60e8ee5463dda76e7fca5ec0db5d3eb1","4b1c574dcbb2a8d4cd641692c1e07907cf8d66b6fcaaf348562dc06621b23d3d","b91794ffdaa56adaa06778bedc8a9f4c9fde88c43c4673e0b774b5f97bfdc569","39d84b462caba6eaf1683024d96098734773f8c510759d857d0dd58d43dc084c","8c7c9301d2254297c3fa375a0062b11199a56fb089d7f83bedf4063f9ad3d2d9","fa7d3c74616b449fcf1d93e58af28e7cefc9e07a2788ee9f99d020157c788ac8","67489a45554ca41db9207c6fc4b13fba605b6cd66618be3880218bae3c1e199b","1ce9afad9ad086057c7bfc40a44d07199e0e2fbe95565fbb52e4e14d796716a0","b8e0a41590cdecf5ee846d5a4dcd3ae91c8a0a052b75fffe7c4c5f4e2ca53884"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3199014646 · entry 108e9186e8c5677a77ce…
Expected log hash: 55430b734e4d00e4ba9c340c7ab064436f91281dd4cbc27c1ffc37d3e26a0e3e 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":"v1791688566698","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"somit hilfreich beim Lernen","rating":5,"review_date":"2026-09-08","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 (79268b3be1e9…), 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.