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.

“Bitte versuchen Sie, das vor dem neuen Schuljahr zu beheben.”

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 2904877428

Proof data

Record hash (SHA-256)

3b49e23957430b593daaa023bb1ff6bc4c38cc6e4be02f3ecd62d68ceeaaa3a4

Signature (Ed25519, base64)

cvkyixXS77MhxDOmsum/lwTldCDJrTV0+Ip9E7IoIBFKv6YNkeXC4Cf6gDfa8sQlHXGgkt+kswBOAvwKVBMYAw==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["3b4897fb4b77baa284747367f82eb77ed2cbe76b2fe0bb0388cfd9e869a18932","a788ebfb4d8ddd2780b24393b2e0524ba238ec71436f536399ece4d9308953d3","1b7d8534ca3f85642b04d20f134d8d2d7d48c35aebe0914c63f6cf03efb5c7e5","1888e55b32518e43a94cf376ec4aaff78f6216c69196a82b91f5df2a7254cfc6","cbe257d981c78c6425c09e7f3f242cf1a56d32cccbce1059e8c7fbe2431c668a","23b3d970460889aa13449028586c2c7ed8a57c560ee0797caa3e72f86fdb1ddf","6d5c22ba8c69495ef208a75ed7b95ca8ebc5eefce3a94fc9b879755faf25bc82","0846a157fd71b60fd7c10c9695e9fa11bbce8b75c37ec93d7af816fde26f11d8","41b30baf1f25881ce88aeaa28c8869da66ff06baa951c3306557663f8f04bc35","8c685d4ac126dce36865d1812aa30785627538177ac02f91aa0cfe79f63d9c30","90df5c697c0e7ccb431a46ba4929cb93820a83012f63a3114aa3e7fb2cd52253","f61ec008da9cedb952cfe797489f2f8391c0dd3d9db879feb9a9aa5b68ebbac5","b296372665f7c3838922f5e4d88b25d49437a77f990ac53d0dda027dc9495fe8","2e838893ef313b8ef0f87568e1e691fc197dfcee84413640a12968493decac73","bce5d442c07de6307e5ea8947098e74ce88c2246eda5e5fc1015a6d7519228a8"]

Anchored

2026-09-21

Public log entry

search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…

Expected log hash

d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"de","page":"theme:vaia/delivery/de","quote":"Bitte versuchen Sie, das vor dem neuen Schuljahr zu beheben.","rating":3,"review_date":"2025-09-01","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","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 (e299bf38720a…), 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.