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.

“Man muss für die Funktionen bezahlen, die man benötigt.”

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 3199819547

Proof data

Record hash (SHA-256)

2be96873d1f9480441d9668185a0f8b6d6fdb751b48363f2fd7874a3574ab254

Signature (Ed25519, base64)

0LHoUFwks8hdO6t05JVApW8h0ELBa4UEh83FVpF6K09SieWFWQmlTBuBZZCBSqRVF8MQ79157LjaBoAFtv0HDQ==

Merkle root

00eb1252356f6576712ea4fb614a5236163b3b1821e2db4cf332fa9ac5a6c4e3

Merkle path

["2bed1d989c8c04703265a076f970e9c40fc405ed5caceeda4ec6cc25eabfe1a5","d4ba18e55152f0d5b78b7fa61f75cdf50ddabb55722d3bbc7e9aa6067fc5ac8c","2c8d3453fa2e5ec8ccab7f66c9d34fb00ecb99ac747f6dda31374e801a8d51de","e9c4de6ec6f4063a71c1a487d8b0f000c15f7fe89dfadba1455a2f3b9ffe422f","c2201bc213063f2fe3e373504a54525cb13449999bbf4b20e0efdf9773a94193","423aa0e6ca446fb0b28856adfb912aaa3e5c5e2893db77136a072d3b7a32f82a","53a4288703f6cda1c8513b76226804d0c0894323ef157fde3214812bb9a35548","955d89fd04f0363de0762c81ace12d51e7b6123a8ce00385062552a5e453733e","fa8be03f014f9f34aad9ef4990a96f0895b324f3c77e3cb4b2e897ac2319fedc","d739e069bb9ea51eb47ac4bb5e2dbb87360640ffd727a4a1805fb38a9609969e","926cb1ae0f46a2402972a2725590821d31092c1ab3c48acf36692561ed5b7536","cbb8d7eb6214a7c50d0e5882819412f63b1580e46b6de02ff26433012cb08a5f","a7b86baeeff583be985d9b11344856a35a889289dc600aefc4e2b1a3564fefe9","5dec716281725808bed0364df1f1b242a9cce0f53a1e675331a87d799bcee6c1"]

Anchored

2026-10-11

Public log entry

search.sigstore.dev, log index 3199819547 · entry 108e9186e8c5677a0b40…

Expected log hash

54bf23963e2d2d167d69cc8eefdd91558bbc8835be34c5469b6e0b1af30e4d15 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":"v1791691808362","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Man muss für die Funktionen bezahlen, die man benötigt.","rating":3,"review_date":"2026-08-13","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 (00eb1252356f…), 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.