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.

“Man muss für die Funktionen bezahlen, die man benötigt.”
Google Play · 3/5 · 2026-08-13

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 3220996539

Proof data

Record hash (SHA-256): 2ed55d6ca54c5ecba54f63cd8fa00f2c3943a920139ad262141b3a5909a8390e
Signature (Ed25519, base64): Ey6aJPq7JkCuI09oyH6mTxwRPoEknPZOn0V6Rxjk7IIdpd0l2Er4eUVfo7hHzDua1lawdvP3VINqIHXWq9pTDg==
Merkle root: 1b0b408c7cf60721bf3cca50f4b7f268b0858a42fba11906e486c6694252cb22
Merkle path: ["2ecfd79d378c56eb80c7209f9de0c243129ff0274cc0dd7cd668862361db60c5","f27daa82b8bc0c4d3d45fb3e20074d6cc7407368f75aac851f3e4c7882661ed1","644b4c42f25a7d8c50ed5663a6fab2864915c36e34162c28593fd1314642fdb8","a1213faa9028e124baede027e7044ef738aa176fc32c2df9b0d6c0a841abea6e","ebfbe98be868fee45ce76ee860ddf155ea09bc6368f5d895493058edd054f71e","fcf10409781a33c356795dbbba78619b687e558d6c1f03df829a3efac58b1484","6886609e8e925025c66f6952fe891ffa2a920dac4366cf2f1839f7b17c9e5c12","b3d95e2a2dfc429ab3ebf86a6c3706515d4e5cceab88f4147543c3e3be8d5027","aca72f70635ceb56fd088fd49e1c8e2abcae654455442a2f34ebb01c5101593e","8afe0b1d37f215eed61ff4b4fd3d3bbef8b7e3e98457bb72a9b8aa85fa1aa47c","8501213cff22bdd65042463ffc599eb00a94c6bbc397e02df36434f1645a4b73","02a91e84dd419fb91142eb41d22148d6364f823a8ddb534904911b59b684dde2","bd64ca269edabfbd30efee623435236838862399942a0d08ad142d3df41d1142","8547750c311d384cbb1a945300d6b6fb4f4bd2b78af7177366b3baa4b4c1e724"]
Anchored: 2026-10-12
Public log entry: search.sigstore.dev, log index 3220996539 · entry 108e9186e8c5677add5d…
Expected log hash: 00694de1434e648cba57bf07fb439ed90ba501083441667555bcf619bf5edce8 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":"v1791779426071","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Man muss für die Funktionen bezahlen, die man benötigt.","rating":3,"review_date":"2026-08-13","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 (1b0b408c7cf6…), 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.