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 helps a lot with memorization”
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 3198489507

Proof data

Record hash (SHA-256): 4c52326729f86efa2ddfbfc6127c3a0180a74003bb80bf1fcef55c3c93efc923
Signature (Ed25519, base64): 4gQwv1UoHKvWP5+p3sXCVFx0/n7qD66Nd4GaXKFVV//DlDBOeXIIKyTJvmM27as5CxmVdIXnOeQzWU6hCM+kCQ==
Merkle root: 240cb93491796b59a812f7182e64c43781541345e454701e4066e1786c286494
Merkle path: ["4c50a363a18b9ba2081d46575f99a6c83ba79d7e2c94623639edafdab07c1b4e","7567d9c94566e2c7914d51b66ab2861e5737d2b32290dfc7fcfc4b1811d38ad2","0b42447448c82cf4f277fb5a02b969af4e34f390ca4a442dc549d3a7a9d6daa3","50107930294bf79d962923863342b09502a68f0a92b2f32dea3e14252ce90585","aca91aa06dd4012c2f7a0b35215ab4058aa8dd09c31763d75e26fdd61861fc0a","ee769567e31b1d3472bf619211557b9e6041fff61d5d7c9f3c9aab48cb5b906f","ec318f1fcf5caf303c5e3c294bef321a5d2ac012cbb2a8aa35ee155f792e72cf","5ddd5514039982880bbee0c95652005db7e00c50d1434b019d5ba1f82df61cf3","9a27d04d796040eaa79b677b3125f5ffbc96c652ab4eb2866a95f7325c8c4020","fdc6acf01eced546f9d2b8658934cc651d62ba2d57e1317249c015401ec0b9a2","5ad3197fefada8823cb614c9da506ee86fb12989dc027331e7ee50856a840f74","74d570f87708582f870a40ca5a8a7690d6274c3d406d2a50e5092b918cceaf30","d18e44bed2d452ffde94f0480bad35bafd04d9a4d8be46c5e3464f257f0111d5","0d65160dee55e809fe06e5334fb3150d04f822ce1cb47b2ae30b5d21efdf0eb3"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3198489507 · entry 108e9186e8c5677ae5cf…
Expected log hash: 50393c13ffd4f8ef4c37424a8293b422d8c3ecaf6b9593225e2bb93e0cf2c210 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":"v1791686710415","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"It helps a lot with memorization","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 (240cb9349179…), 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.