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.

“Ich empfehle sie definitiv allen Studenten, die nicht 4 Stunden am Tag damit verbringen wollen, Zusammenfassungen des Gelernten zu schreiben.”
Google Play · 5/5 · 2026-09-13

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 3239939960

Proof data

Record hash (SHA-256): 485166e71f17c094ea9839faefad9a5d38ab212b221e43f6eb9fb63643741301
Signature (Ed25519, base64): 9XpV4nMpKCFgD6qS0tQaC+0Xyxp1IdIUk7w27V8YQJI+l0No8zVFjTW+K0cWw+9NqYiIkRPEMi/gK5bIhZjjAw==
Merkle root: 954962254ff2eae9503796c02bd08deefa3a5722e4ac0b3981007e2b9ddd84c7
Merkle path: ["4850c40a367fa475bc9e823e3ea621c5f3a35d316efe8adcb26f1b2318d7ab18","31efca374744546af2a60f7d1c7ff1b01e30b5ee620c820008c0619395acec0f","d4fe480c23bb070549a16b73d0b84087f8c69da27b8e0e8ce8df7c279e4746a7","846deecf20e18450ee46e602f028cc4b2cd371b3801132de6447b6280b6fbe79","26971ddcf84ca46854d3a282f23918af256b2797b8013ffb22a59d040e605cc6","98e3df0b7428c51ce8dd7f081a9bc53c7346613433bc26524da3a15e98f27984","13c7a60f387e5d79afc9cdf580b89a1faa5348d767289d1383889a173a5bd7bd","2b934325f087942346c9f3f318ec21b8e20e0d00ef669a3abf936523e14b03a5","2c0bcf38d5a67acbf53aba0d6b34daee014e3894e7c50713edefa71dc22f7e7e","07c9c3ff2ad40a6a51b748f8a25173ba55a6aaf65a30e7972068693d1b77c76e","780157e889b8acc868bdc5fbd2b9f6d948cec0f255310afe76e4ec4bfc3a114a","37d889bdc912bd16145284899ed1544c934e2d5178cc362b2ba799bdeaadde22","07b2ba787804bc9fbb84c73bed76b7f65ff1b8c1694261a8264cf5f3209f315a","e7bbbee54f729cc449b73bfdd383c96b7b180e618c270037b5697f1fcc75f254"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3239939960 · entry 108e9186e8c5677a0082…
Expected log hash: 28fd9464b857a07e61931e67235e692cb8af33d7541a60ca163756a54a64e9c2 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":"v1791859824762","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Ich empfehle sie definitiv allen Studenten, die nicht 4 Stunden am Tag damit verbringen wollen, Zusammenfassungen des Gelernten zu schreiben.","rating":5,"review_date":"2026-09-13","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 (954962254ff2…), 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.