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.

“Very poor customer service.”

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)

efe76460e955c1d17cc927d290604c8e57265f337a350bf1cbd5f103ddaac397

Signature (Ed25519, base64)

ZfGfEFUyV6pDQUypuqKpy2pxcABqJdiaAuCCJtyZa5OeF4U0ocufeOiEG85tK6be0N5HO+I5bXbhJMGRflBGAA==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["efe7ebc4eba4dfd31db12ed9f7721ccafee54ec2d228b5c97f4fcfbcb0b6dda4","59cac8aaec9b53c46b15eac26e2ed9ec28aafe13e47ce3712df8c29c03414287","8a0ffc9e9ac054850fdf0b0196d3b097685f89d2ceb7e38673339aa9a8119617","729874c6c3cd1f617ad31bf8f9adb1e3601cd0839a479ef12f668bf65498a4e4","81d9fd6e75cd571d2e89a919b4e0133a46ce1e7ca265f1ecfa318f3ef145f769","17e35401a75e7e872894ce53b7e168b677d63f774ed24409ca2ff1f0abc4413a","5c94b94cae40ecc05e0dd0d4e9859b85a88231a7c7e6afa9af6338bac059f2ab","f7172ffffc863cbf149d22f365088f83384f48ba2755b794dea17fcf05776e2c","74ec11c72df9a5d648ca053faec40e5e2615571b6b2d87128537aa85890571d5","2f99031d1c290dff8d9f6c1f2e8f06da519449eb2614405d9c5ee1b450886c17","b331093f92df4d03f0bcccdb4c283a2d98779d6c363a06d0cd9c35338c6b7f1d","b382aebc31acbad71afb3ae06e4e6f9b354e9da57050f36d03bb1ef97dab503a","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":"en","page":"theme:vaia/service/en","quote":"Very poor customer service.","rating":1,"review_date":"2026-08-31","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 (e299bf38720a…), 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.