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.

“Fastmail had made me fall in love with email again!”
Google Play · 5/5 · 2026-08-15

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 3163461995

Proof data

Record hash (SHA-256): 78cb3c42c18af2d7a488db6af17a80e33940524d6c1cd8f95a79ab96525d59dc
Signature (Ed25519, base64): cSl2QVmh+3OPa7yTh3FBRraHdX23ZyeQU4119hWNlhzxroGQpDk2C34NNiPiVGnonw5a8rvh+FkRv6vEuMjEAA==
Merkle root: f2dea3193623a59d18b4d230cf1484689c024b05d34648a4bedfef78c47360d2
Merkle path: ["78caea6447950ebe577c7816e7d3855431a5f1c621caf6ebcc3a0447cb5a5580","b30eefe8f10e2799dd18bc9b94e33c7b014cf9aaa553c5f333a86ae16ace4e0b","20f78d6bc26d22804a0517c3bb27200c1d0a9cf56d25832600db3af7b1c10784","f6edb6ef22197e96ddfbd8b9e2937b9a3ca0778aa45a000e0e88a5481ba10656","7eb60a1fa397abb5e03bc96a9831bb5ead3772ae006893ff425c6fa3f82ee3fb","f99f3ff9dc3fd1a44a1006f6107b830ac513b98c7f78ada4aeb86584e4f990a5","d6696a2339652be0a1f3359f5f9acede8dabeb17c2c566a3f0d8d4fe0a6876e7","63b27d0d225459bd18ac0d6212732e7ce40131c161b5c4220c271f7e614659e0","b66cd65490c05d04a5a982f3883a725dbc3a4a8406f5b86f960541b62bc2d2d0","08ce6051003b1dc5a4af2109ca831a3b5f0703e337031dbd00ec7c5beed02e39","6b583c21dd7148e63cc2737ac6e984cab4dd092e875f4f57450ae5020b4f9215","3dce281ca0e614b1dda8d0ed670db8d11da28ca67738915db89014b853040875","d5b457cbd06c72c301c050bbc18735716496080f1e92d458625264f50eafefeb","3cd750b45485739a93e8e5963aebbe2dbf3f2cd6fcfd5ac889ea2792f103cfff","658fda4333b0a975ae51c0ef52c37c157029d897878579fb5ff3ac48198b1bf3"]
Anchored: 2026-10-09
Public log entry: search.sigstore.dev, log index 3163461995 · entry 108e9186e8c5677acea0…
Expected log hash: 1e385e1035f15f3dbe860bb8f3e4e850b8c2ce2b31edb58c97be626995a4adf2 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":"v1791544610158","kind":"published-quote","locale":"en","page":"brand:fastmail","quote":"Fastmail had made me fall in love with email again!","rating":5,"review_date":"2026-08-15","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.fastmail.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 (f2dea3193623…), 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.