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 2904877428

Proof data

Record hash (SHA-256): eaaaaed9593712243392d861c1f35177fb9d5758812e4438fb2310c103614857
Signature (Ed25519, base64): j9/O6rVNi5RokPPgQ6IjDZZl2+J1C9V7sbD1foNikNA2kP1W8g8qOAa1z8uRxsSjsJD+pILqd4WfsRcSZqWuDQ==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["eaa804c1140874d72f919700ccc263fa066ef92455009080dd097c5c2b11fb08","3beca918a5f9c951fd3fe2dbc40802c30ec07617e9cff56391f71cefc9dd1484","0e3041aa5b08f6334ecd6d43825cfc98304b68a22d357266998409ba9b4dd14b","4271d51d98d32294bef5b71b746693324dd98ea5f374dffc998eca18fae97c1e","8c99e5d8a4628e91817e4fbecb3b1327e5e7f2967cbe6570a89ac062ed8b5376","1addcd6ca2138ccbeaf75c394a7bcb399fd4ab9c13d699f588526cec86bfe2cb","8712339c7bad4928b9cb00239b7ac81bf85c57bf110ce9bae4a50b771dbef797","de97694bff858f7a5d6259c6a1025fd8344a3d513c2f5f6d9f28e3d3ad2fc1c8","eb9bb045fa8d590e24e02ffe9577a956e04048ee3929d88ecee8b511ff062e12","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":"de","page":"theme:vaia/fit/de","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 (e299bf38720a…), 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.