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.

“Ich hoffe, dass ich das auch nach längerer Nutzung noch sagen kann.”
Google Play · 5/5 · 2025-07-19

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 2907673729

Proof data

Record hash (SHA-256): 4a684b702431ad393e2441028d58e5aeaa6154b51be7e2c1392907a87cc8c8ca
Signature (Ed25519, base64): ZmAF0Q+fkD4a2aQROIXb914CrmbJ+EIbakng+VKF2nM5mQwW12MTFH4NKQKP0eH39O2J6k4n7tz1zyUlr2r7AA==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["4a6b1f4987500bd6cb640b60c4fd21edf00777fc73c8e44f5933d3a21f0a8ef1","f17eeda0379535f4395c3fd6c8a0f4c471ad519f3231c446060f90971fc84677","e446e4fe11a56e77eae1d70a00463603d41a421beb5c51690f80b949c5b9000f","a5dfb8961e3b9814485b1e52e790b62d57482e4a806e7e0724fca3e333ac3130","52a771a2a500d5f5d404867b981ffc2f7b27763ae305f37ed023c56e378a890d","184654eedfc26b82a5d919c2b197fc38810fbb8429f4bbb07bc24974af74bebf","12f8326edc3d9193928faa6689755e1b0f04afdbf3c565a2429fc90873bf1e97","d276afe0518df940628e7925eac7ca91e27d8fbe094d7b6c307b2920d5106922","c6314dcb00c3da1f4c44b4c4b7046af86ffe440da2c21e877ad9255f5d04280f","d79f3d0479c675e8d87cad7ff3688260e6e42cc3d4dbdf6e33787a17fa7cc25d","7d0a97ae88d1ec4b960642b3dc54d0419bfc6e1cad0abfd4383c77fc83cb691b","0197d988959ac12f7d8946ff2581c88b7ba9a4305193828cca53fbbb9832a064","bcc0d977b8ab2060a87584efe5d0f5545e840726716d3f02c248db108122259f","6c299608515c69a03540be35865f96ca4932f3e0403f8f39fb0e1c2e2aedffb4","43a562d6822dab12c673c1efa0a3171d1ef69b949f676fb01847e1e5b56274de"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"de","page":"theme:vaia/durability/de","quote":"Ich hoffe, dass ich das auch nach längerer Nutzung noch sagen kann.","rating":5,"review_date":"2025-07-19","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","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 (b9a08f9d6d76…), 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.