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.

“There are dozens that offer the same service for free.”

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 3258859570

Proof data

Record hash (SHA-256)

2ebb63d9567a0acd08d9d38717197152278949d64b1ec9c501bdfd4e62563d45

Signature (Ed25519, base64)

FU8y4mMRd9WnvpdVyxuLwlS89VZ36cD1fh8qAiEOOVqsaUUO8Pq/EViYinF03GwN5oHZe7pMlQl2ii5fj4vjAA==

Merkle root

ca3049e83faa90e23a8ee728d82960c74b9da8080000e4c92979853b767b75e4

Merkle path

["2ebe4b2cef26bd41ef37b878633aa3252455502c331bfbcc27bc08fe5cbb4ede","9d5bc9c9b297175d7d84bb85e920467d563692f5d4d062a6f100114ce26a4403","90bc2bac3a1df231f19905ba44faecbebbdc1bfafc77021718684cae6a78a26d","73459cd73f35f17aacdedde2c00a296163b141fb274480db04d45aed9413129a","9024f117e8e816f4b14e3217771960927e1e61e6a88dae09d8f0b9c6fbfa3ca4","99fe6d2b2caac321161c7834eeeb7cb4326190d8517fa4b6c234647f1649dc03","a788bb21eb1297f283758e15c12dfc7656c1e7cb53848066f15e2cf013e8e0c3","dccf0730bcab377077b3d447882d1268f8f7dd63d56e7949f20a18546b056754","c65e3d3fcb12bc5efc33972fc13340875748e8a6b294ca098b3cc1e0c4e5471d","b8666cf24a8dee4952cf60c798968c99be4250495f8d19a64ca045c3d967e5eb","3c861171afc1234c13d38e0a9581ac6cb6efc1343332ad0b81835f9345442915","c528a565399f1c43ffb0fc3019a2c2cee2d7413a87787555bb34d4d613541976","3eed51977edad6c2579b7e509587049321fa77487298d3b73535214036c0118d","7614ef067de1e21e5c4ed10ec802ff07f79b9dfb75186edc1d9abf343905b9c9"]

Anchored

2026-10-15

Public log entry

search.sigstore.dev, log index 3258859570 · entry 108e9186e8c5677a8fb5…

Expected log hash

37382a24206a9b79ef105a983cf477ccafc4b4430b1549876c44fbf5fedaafa5 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":"v1792034893828","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"There are dozens that offer the same service for free.","rating":1,"review_date":"2026-09-14","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (ca3049e83faa…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.