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 kann diese App total empfehlen!”
Google Play · 5/5 · 2025-11-30

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): 089acd109df431263a4fd246533547c138167d46fd6a729a95a4870acbcd3aa2
Signature (Ed25519, base64): bnXzrcv7rgHV+hdXa1kuUAlmJMxgzNJ+TdaDiyvL0KC0DYhWwx5mA0fjnsrlTQ+N/izrCBW0S1eGEmq3Uo8GBQ==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["08a08a94060bcdbb56d0ed9c40f2fb4d8f79e30fecfbdcbf332f6bc1445eba36","bf420200c9939114f8d0466002fd1f1cfddc6da513f650be31fcdbec3238e289","d7011ed881b6b4fdc20e24558359bd3a0926e838dd21dd4130ad4013173244d7","ba5ff28a33a0e68a5382839af9ec75a35940965e5ea51d21b7afbf6604fd17f7","9d408f35d48954462a9b381b408284975fbd470a1646095b72b79ef5e250375d","9d84a8f59efc295bed4956fdcb61b2f82fdd32d5dd9e12d3ae340abcea6cf7a0","ed3c8a033fa05545ecf983c06dcfda1e41a14ed47ba6da99543c0e397b12dd20","b8f6446f3d3b0eaf2dec7061ca1a391e9c4e1d40e32e163e60b52b773f74dc36","46315284783edced841b19b49e546c0e91ec78bb85b4cdf46e22840273f037ad","a760c30946551ef24c58bb928fdc9e7acc78466a7ea8e26bcb34f1a203e6cb0f","d8750192cd85db07c95ba5834e75c9b36f88322bcc39607da9a71b274b1d77bd","85daadc41544f83be69d5533c0c879f1f8a6b6c7e356bd7472ec3f624cd585ca","38643099e759f6b9db1dc190b469982c0e70d71dc8caac721f2a46ded3b658ea","7a4792c9dcf9466d19ba61ec3efd4f578e21f2d3035e8fa6a6264d3045083f7e","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/communication/de","quote":"Ich kann diese App total empfehlen!","rating":5,"review_date":"2025-11-30","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.