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.

“Very useful and essential.”
Google Play · 4/5 · 2026-08-12

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 3198797320

Proof data

Record hash (SHA-256): 18094cf895ff9ac6c098b8bfbc83e49a4c006330a966eb0407448a42e00a5d08
Signature (Ed25519, base64): Ap5bnoUfGvSclIKxhpKrpaDrlpn4yACEcewf51W2INF2GEIZjwLLeFPDBSMiB1v6Qg9wJyX9mAOcu6VxzyWNBw==
Merkle root: 199738dc68b66dcf66f6b0cc77e2cba74c3bfda88989684620837b4c4e64818e
Merkle path: ["18074b2f954dce728a21282dce6a4ec24beffcf3546f49910c2d97a00bd27758","e336f07d1f5c6b2d628216b2c1f6c94f3e0f45f521c62a58cbe377c496a489f1","c9fc19648e9675154615ca1c0cb54c119657261716e931580dbe058914908aea","06888926dd93f0d669d2865d0589700ef111c7ceb1155df29bf8cbde659b9b8f","764d96d6cc0697614096baaed22f2e035d36d56dc3b5d48aa15f0ad3b946d138","e5f4e03a8533cbf1ed345fec8a64c70db75cd7b5d04b64dcd95353c0217cbabc","3ec58eb1851650a434a98fef27bdb7a4d933754fef3375dcbf0a9e0fbf366c47","49e5bda81bd0bdbd90b15f69e0591f1f482a7e7af58f3889a55c5684192b6ae6","31a525ed3438a8c9b94b2ce3215b132052d3adc41f6bbda660834ef3e22b4ced","e7defa53ab3603b7c4ed675413c2ba2dfd2f2d4cbf1d47965182f3ff1d79f710","237d92539dadc5c229398abd4613f475072d6788bd28bacee8b5bc01f400fb10","86433dc4e5776691731438e65de2d710dae3d65c747d632e0e4f67a92455b646","89c2d1ad10f8da8a1ced326bfbd1f55882866fd705571bc337258b3314dad42f","ddc8a66e59fc8f0934334cf08e419f621290129e658cbc58d8ec27bafd90b0af"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3198797320 · entry 108e9186e8c5677a14ba…
Expected log hash: 46227e67415cdf5b62c43420eb8b7a80b35acaa912410c2711787f678b77c9c9 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":"v1791687727006","kind":"published-quote","locale":"en","page":"brand:acrobat","quote":"Very useful and essential.","rating":4,"review_date":"2026-08-12","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.adobe.reader","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 (199738dc68b6…), 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.