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.

“Wenn ich begeistert von Threema berichte höre ich oft: „Aber Threema kostet Geld.“”
Apple App Store · 5/5 · 2026-06-03

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 3140475820

Proof data

Record hash (SHA-256): 194366a977ef5e4ca0ebed55259a4baf85377bd8d08dbc7bda31c0994e91750c
Signature (Ed25519, base64): mPDZ7wLzbexvMQ2MCxX+BGUZyImOpDyfP4gKdtQbo62+hQjpe2eJqsLDGFgj9VQVyh8znh6ZdGU4w01lECzjCQ==
Merkle root: 52d6be1abed15ebd0724a0e1a493d5805e1ea49ddcaf8e9e5584928cd3e4d759
Merkle path: ["194892319c3ef0c0adcea26484b1e5278c29b2c26a7bc78e671a861d87f580f0","221a464e6f72e0f3e2bc5f04e016a1c07edee404fae9ca7d427f5bbe9d05e3cb","ba5dd6bd228c8cbad56ec532b90f569b3ab87b4ed0157ea4f4d49ca93ce6eaf3","3cf3b79f6d65f154abce58ff984cbefe11cda4e6897b03972ed2d3d313eec46a","e49b6760a01249686f50c014d794173c9766fbee400d52035150c350c0ebb43b","5a768ea5a48e19fd16f4bff2121a5f4ef64a85bc011031bb742908dacf83444c","8a30939fb2507dc51d9cbc7cb82aff5a2a6b0ae1a6567fe1d8ff49fb4893dbad","d7809c5e9f4d80b8d51aa64a3823100d34546c6ad4c50a2e959aed216fa8c0f3","e906a37ff62f0f17128557f77e148b906df626b9b314d7d2ebecd6b990fe737a","a732724d3ac2b7dcc60819bc435886a0a09fa8ed313610a8344ee74ffc7fefb6","ce7fde0d39bc3203f33175015162e8d82b3e49dace80b277c9c59d8520904fd4","2dc8e1d0a0e516acb8dc01ca15884c459f0a0e973ac35b96e1808b584dc8c14f","7d5e1a3da5381843d312196fd4a9f69dbe86b152542df1be09d403d47d5e49c4","71d5ef7f970539b9a82546e0bdc1b1069245bf71351875f786a78e5550da4e15","b72fcc24171828b3fdfff6be65bb433d37b8e51a187739d27a216a784d84cf36"]
Anchored: 2026-10-08
Public log entry: search.sigstore.dev, log index 3140475820 · entry 108e9186e8c5677a78c2…
Expected log hash: bb68bef30792bf00f645df162a48943f770bc3f026216a44dedb4651c8ac0917 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":"v1791431489246","kind":"published-quote","locale":"de","page":"brand:threema","quote":"Wenn ich begeistert von Threema berichte höre ich oft: „Aber Threema kostet Geld.“","rating":5,"review_date":"2026-06-03","source":"Apple App Store","source_url":"https://apps.apple.com/de/app/id578665578?see-all=reviews","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 (52d6be1abed1…), 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.