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.

“Erinnert uns immer daran, dass wir eine Aufgabe zu erledigen haben”

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)

4a09febdb436218dcd1664c0918fdd25d2aa46154dd6420714e4b5c0515a4f06

Signature (Ed25519, base64)

ge6txrsTdjU3Ja1h/oNg/2RgG5WkjC6siEXlNZqJuok6O7shOAp2uxVxB4KLLZQzVOUcGOe2mEgkicMMyq3nDg==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["4a0a7856b06b50030e1ae4b09d8a7e451b05704ce256a6d2977bc9f6d42a0882","e6ba1a445dd40935f2b9ca2005346884060c51ff9e6b0724c96a7d36a3dc47b4","ab5eaa5560cf921cddb9c06aff027493197900547b40729441007d4ef7e51a48","78b4cb4cf1a138e5640d0ebdf20c976a90b772fbcc403c039540548970e932df","7084a7c9f2647cbf119682d2f60e64678d7fd673a801b663c1d060e4d211d52b","e58873abc6b9d5df65752bc068add5ad216906dbe3ecdc3fb1053c7b4c81b594","96e1059c79f6503a943ec6e85f8faf17453f8f559c1f921a4f8d8b94ca82893e","8215fabc19bd7b37ec893e8fe7a9920a793b48cfdf0abd21fe3629ef10070819","ea24a1a0d87a6a60cef1af74f367957ca2cbaa4e37a2c2e0b7d96dc38accdc13","1644972b0586a73ff1d58bc99f9ce298dbd629c433078606dee9c471487bc961","057db33d4b111314407fa33fce072040faac3e5b276da3d649fda548f99556c4","44c08976ee58b5cb058f11ca9229b8780c4a6cf8c64bbcf43373011c4a37225b","ac995c9ae640659c6b258d62d0cad1933912ca122fd33d27f90560dfd3199a84","aa4bbeb87247c2797626ab02a549451da6dfce4dcb854a36fdcc601e3e788772","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/communication/de","quote":"Erinnert uns immer daran, dass wir eine Aufgabe zu erledigen haben","rating":5,"review_date":"2025-07-24","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.