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's no option to keep them as is”

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 3220367991

Proof data

Record hash (SHA-256)

449e338b956d8c89a183c82f31bfeb48fb4bf9b60de96b37c8d1f4d1f3424491

Signature (Ed25519, base64)

hh2Jd5tCaOSK2cl5zjqzXwERF5STC5VG8FRPsYwjBTJXuABDc7GgQ4rPE3UsgkX1E13RmjGuiXuYWvRmtQmoBQ==

Merkle root

8e481f891fa4a8f9e77c0279ca152fab4383b65a50decc840d9fd7569bdfbaa3

Merkle path

["44a2ced84902d18fa487be0cf38398673853bf94a2ddde2e9dd490c2fff64a4d","8b0652776bee188cfd74aad54869216a5a304f9217238d84020de7d8b5e020df","5e5da38f6d4a7ef8eb7834688e8c67524804b779d2616d5cc5ceabf83f1f6b72","9997c08319eee7894bb9463a6be55cc80115d3816febaa403a93669b3f8c70ad","28022ba09452fb60c480f7caf07bfed97e086d819319fc33cc7c6db8bdee92e5","d608ccc9d391a5bcc98281d19efc24953b48ac16e36d91ec0ece78d457af149a","f3d3954b799ac2a8600f6a4c6a1f5c8f3d41a467718fbb3e8be45393002ba6ed","66d4e690104fd00d3a80ac3640616a4d39221ecb20853ef4a5d1191649565d37","9a4f22feb645d87e0c12ee410b803642468be15f5eba8ba8bfca3b42d3872a7e","2d42b31f359024c3abedd58b8250aacbf22f51e9cfbbf376455d69b6923062c5","b0d19eb198ae92cef79ff7b06a3ab9a6d60fdb5502f9f4962c90f48d23c66b88","3b4f21b826cbea2d43ed04a02447fd6a5c5177bac5ab8f0646d2865e69ab2bc2","a8a51e6cf51feca9c73f59ef001af57f41b1cec2b5f25963206b5df2878ba531","391099ea13ca712ab4d3c0ebed9ae37f021122ce33d031a4f3442fcba2038ec0"]

Anchored

2026-10-12

Public log entry

search.sigstore.dev, log index 3220367991 · entry 108e9186e8c5677a60ce…

Expected log hash

9a2b3ddad9c3b29dc171a15554fc81f3d4710c01a7565bd2f28b92e7b639f6dd 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":"v1791776812348","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"there's no option to keep them as is","rating":2,"review_date":"2025-10-06","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 (8e481f891fa4…), 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.