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.

“especially for self-assessing content when uploading study sources”
Google Play · 5/5 · 2026-09-17

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): 3b3d11317969a52eb0911b6ba50556f38bdfb8ba1547c2cfdb07969bac2f3825
Signature (Ed25519, base64): uQbO/CTXGGka8iQjseaLzVlf6MYCvT5Pl/BLrllaIaUQuE36vtn1EVG2jg5VFLf+ILlQRJvDPNOY5a1JKO9sCg==
Merkle root: 1b0b408c7cf60721bf3cca50f4b7f268b0858a42fba11906e486c6694252cb22
Merkle path: ["3b38906942631f1b45e4da0240b2b1c0651db516256d74148c6ac45cdad890e5","6cc57391240879c3d4cdc4c58b9793ee56ca09ef82a275e028a640426e5e2753","39fb1d3cf70cd71d35d8310e129b781f11aa8c6b2ab5c379fe7852b8a1b5263d","8f9b5a460429fc69d8b28c8cc37fd176bb22f9d3dd32504d8098b1bf77fc37e5","7f5993a5b4085a9a038d7bf6ef62d9297794231d9fa68fc47340096683363b17","84b4acb32bdb578251cd935aafc88c0184fb008a81ca46a2daa3df93605d7d7f","347aaac53e199ca2922f8089906430f9858f8974a59877e32e534400e4fc821f","545c60c5f14c0b14ba97b8c3787a4a3a6a1792390968dfd193e88f7cced4f87e","1adc30224ef6dacd45bace6df7f37b4a2018e1d2840048e8093ea2f1a4338108","277f36678228d57750984f6c9e6904f1a9988773727ef3d6eb5473cf7f4c45ed","2325b204cb902d18f6de3066c2e32c0b1ef80713e8508931f526dd37f3293ba4","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":"en","page":"brand:vaia","quote":"especially for self-assessing content when uploading study sources","rating":5,"review_date":"2026-09-17","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.