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.

“doesn't use Android's Calendar API”

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 2612584084

Proof data

Record hash (SHA-256)

09c7717bf38b29e3cfd887c4ff88b854daa2c2fb8f8d1d098c479e89b63152b4

Signature (Ed25519, base64)

XNKfVAtprpDvl6JVjtj4olc5aBhFE0cVm3+dHo1yCA0WzcyzxAlBNfSLFV44DB7wQbrImVIWM1tOBDR+a8meBQ==

Merkle root

11760913b24394c3efea903b5693403de67f30c73517589265e62147ce6d7db9

Merkle path

["09c736e4893628237aef71233bd9d78c3664b50c04811cf17e4beb25bf7098ed","07b2623a7f175e2a6b7fd3f718b3fd5a3a41d498723183221a12467622dc1947","6de3c4fe6590ec9c23fcf95362ed35d7702def3864fbe8ea6af0dcc2fbc83b2e","7c7349a40a5ea126e6a1e68dc9aab71d0ec59850e2b42e7a12a11d961ccdfbbf","c296ac94c9a0dd4bb69e6effca5878bb64f299551fe8ae77491bd8c18bd5b108","a5b06927db0433a71c8fe06238c2266370aeb9f43afcb723b0a38fbe79270b4d","931d4640735cd79ca8acc602b1a1a507feb998dbb3531338fb8edcc39bcb8e6e","377ecffcdc80900605c116a82a65de628cd7405af11d1571b635397ac4a09267","b1ac28a40eca9f09064ae31f47a9097b95ac73532873a527eb3378ec97e81e2f","66ad941ea175664c11626a9423c4fc095091e6b8002d520af37f066eaf89ff76","ee3e6d1de476a7ce3dfc53a367d3d995ff810d2b3b5cba0fafbddd836558e142","4e02c6a47369138d0eacb837d8bed87707d8edf6573bf9a07b0288ec7a1a3832","bd8f0b0faf9d3ad7c16d60f7a01c003de274172458ab1f670d78e9cc1dffd585","4d94d9a9168f14be08d81b3238e6d7999acaf99b1233bada5f6c2802401f1b45","8cba8822ab29049afd67fa646ac9379523fc6be8932688ce4f3067f563511db4"]

Anchored

2026-08-27

Public log entry

search.sigstore.dev, log index 2612584084 · entry 108e9186e8c5677ac6bf…

Expected log hash

0a57a1a3ef828bcabfde2971260e46ab649b0f8c2c96e231d49bb83e51a8ab3d 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":"v1787801559681","kind":"published-quote","locale":"en","page":"product:proton/proton-calendar/en","quote":"doesn't use Android's Calendar API","rating":1,"review_date":"2026-08-10","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=me.proton.android.calendar","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (11760913b243…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.