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.

“it explains what you don't understand”
Google Play · 5/5 · 2026-09-16

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 3258071454

Proof data

Record hash (SHA-256): 2c34dd24a02ad95cedbbb1c3d56fb5e7988a32bf1f97ac768ace1c72f08ff8d2
Signature (Ed25519, base64): k4rnS7G/GsNYe4TJ9m+5vKq+4jjYwuHx+8l7rldA/mHBBuBeZC5gDHdtALVxooY7MWjWwrAGUfXHJp7JRGKrBg==
Merkle root: 3286418fc06d25de584969d1d1d5f4b079918bf6b5a5178364cae8b78bb351b2
Merkle path: ["2c35da292bd6eb5778b31645dd144f638799bb20186b2e94f4d6809f65b2e3b0","e091bfe9c379b57d7c4db77a466cf33b6ae68f0f720646bcd03669c31c36fe6e","1792db1116cd6a364731e4bbb8cd4928e7638a9390e38ae13f77548cc3755ca5","785ff7618b8e018797d3b85c4aa39f418b46b0c15751c7792c1a1b2753d46746","a942c0bf66930bf8c210c9d4a5ee39e396519adc8b32bc4ea7bb8f68525cd5d6","a763532dbff35151c5d74e97d8befabe76b9af96a2719ddd2c38ece5609b2877","59ae1464dfc8a673feb5f17273f54a87db8f6da126f8064f881d1bc55730a9b0","189a1dcac2fbb1cbf45f131ee29effa58245a3d67d93e143e9910fe59621cfba","7ec333879fd128f00b0daf7d8040f2b7ca015e56aabd54803d4f91eed93c8be8","4ef4a903d1a840bcf68c5cb40d775b696dc873fd00ce9c0153605e2db3981246","1d1100be7a34c450ffa8104880455cbdab68faab3fcf0b9a1902eeaa174e1fc3","49e05cfef927266c6a609e22c205c5fdf538ab222e94c5e3282700418f88dfb5","d9800b1b87d047478eeb89f8a1dda19593d3b273c40fa6d591a1b944763f5e83","b4d8773b8032d1dec9dc6fa4ba1d52baf4d9efac6a7cb542ab0617b855dc5284"]
Anchored: 2026-10-15
Public log entry: search.sigstore.dev, log index 3258071454 · entry 108e9186e8c5677ae2ee…
Expected log hash: f9026b3bdc4a2e986a01140b2370b0ce9ec3e7c9353055dd7c9909c6a9941809 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":"v1792030101458","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"it explains what you don't understand","rating":5,"review_date":"2026-09-16","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 (3286418fc06d…), 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.