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.

“Zasta helped me a lot.”
Google Play · 4/5 · 2026-09-18

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 3272274666

Proof data

Record hash (SHA-256): 2f21cb9e25e818361ee2d57a0cb8518e759bcf7502ba3f6ec7bfb2c4f84ba059
Signature (Ed25519, base64): cJZWAmptVspBMDXphTaz9b4YBJO5KBRfm96hdfuUlxu8iBXqRzHYp2k5dzMED8Gnob6jN69ur0g525SW4baSCg==
Merkle root: a4d47c2a34f6eeba31e2744fb1551fe9a0e34820dfc152f1ad93a68b24759c3a
Merkle path: ["2f204f936e9f3d96da4396374ed8dd6a11e57de7f6008f3fd9a17c34d0bf97ab","1f972e04da83b267b6f64c654c9d30c1abdf914ffd01bc8c7f189027921b4d36","a4a0611b420e28f482108d91ce2916e2b8cfb1e2b98120268e1e75d7dc01d311","7fb11b8864782363032aff57becf87d3242c59b98ae4b3a0d4c0060b1ffe4185","0b10616c25240c8deef37ba0bee3d2c7521290ba05caaf65b30268d0a1eb363e","927bca7677d167ab277b1e3bbf9318ba84edd8cf37e7422ceb1ca93880a8a597","3efc91f4cb68cd6f0d2b22f5bfbfa109da52fa2e0ea7fb9c94ad6bec1d0b4d41","6c4283a05eec5c30516dc02c4a6d9261a86a3bad2aa3ca289c11ebf86e8c5115","465807756bde1c1f25c4bcff8c36ecef6cb36471f36995d4ea1c6776f0ad7bd9","19daa0f89ddefd045efce6d96b7b6254c685b45ae7412d0ac14dba4b0934a8a9","5d71dfb799af9616515551742ebf194eca9971ad386cee090b62aeff22bd1d8c","718239fed8057dcd9c8669511115793713c3c27b1e9657de27f870abdd5c7bee","0d7c4faad4992f205f2c1ebb2b0e4b1b7e9d070f1f77d3f8d64b80626c324f46","35108299fffbb5c1a0d86f074b5805457d73da5ec7c848a19bc9a928f6a42a99"]
Anchored: 2026-10-16
Public log entry: search.sigstore.dev, log index 3272274666 · entry 108e9186e8c5677a2724…
Expected log hash: d56e71820b4c8c62b755e9f6e3d2b624566d12db6dd1606e99ef55749400c387 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":"v1792036997995","kind":"published-quote","locale":"en","page":"brand:zasta","quote":"Zasta helped me a lot.","rating":4,"review_date":"2026-09-18","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=de.zasta.app","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 (a4d47c2a34f6…), 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.