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.

“The costs are very high, though.”
Google Play · 4/5 · 2026-09-19

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 3248278454

Proof data

Record hash (SHA-256): 78dec5dcc3e477e5e8cda375095dd68ba4f2c59a582cbd084ff137cc04cafba4
Signature (Ed25519, base64): rBqR2mQtZX9vztPIUPYmmOow6e4/gH0YUAQXDnBUz3QSTfsYCzg79pyWoReCvpMQ1TveaF3z16uPyOWS85R7Cg==
Merkle root: 81db1abd6b6e636da393518bb64e907fa9c48581b44ac2be5a9e74d02608e451
Merkle path: ["78ece719cf63e88b919b427a426ffe9520ad37e23d1c06793859dd1f396451b4","7cf6de81c86f8ef896c2bb04059d5516b238ccb44e9cc801777cbeaa8f92fd2f","cdee19903a3e5e9ec60e5db4218c52251ea2d2c8c12704a39b10ea1f01bf8176","3c04aa5353cda12f706feb11cbcc97000aedb6c2bdc6e4b25f423400b59e726c","b51295ce229dff84f49250ce77796b0b6e7720ede0451bb501023d8f436cd6ff","83f75fc790ce9df4f456c529876b468a11ce6d873c008e610e3bab1a611c8ab9","b759631b4c802ea28d12303a13e8d14a827b5a5b3ba0491a16831a01d47bc7b5","e303b07a63551389e630ab3b65d2845813dd05fb5828eb7ce5aff84ef47b2e7d","04681faa3c506f04daabed3f1834ed7a68dd254d356f695e5361198c0f2ced57","74275e72237c14b7fe42fca8e3f3f85205284c262a20695368fc56b5ffa5e643","d5672bbb31e3bcb7edcc920562704d162edd377dd0f14ddd0a409a526cbf8eaa","cecda8cf59675307c2097f3c9b95f70464ca6c0cc9dde9f98213537f2b0274b5","9fcda85d8e37e19a15f376a43900980403d080527146762503d0fea51bd87692","6fa310e475466f0115dd6b7ba199f23e915f2a513e2610274356ac5bd367e940"]
Anchored: 2026-10-14
Public log entry: search.sigstore.dev, log index 3248278454 · entry 108e9186e8c5677af67c…
Expected log hash: 4dfbbd25ce402c4821f7e2d50b18e091e9a30465f45669967c545fb71910f358 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":"v1791948368672","kind":"published-quote","locale":"en","page":"brand:zasta","quote":"The costs are very high, though.","rating":4,"review_date":"2026-09-19","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 (81db1abd6b6e…), 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.