Use OpenAPI/Swagger to crate a payment and doenload the Proof: http://localhost:8093/ebics/swagger-ui/?url=/ebics/v2/api-do
Login with: foo/superpassword
Hit Execute.
Note the receiptUrl for later download:
Replace XYZ with the value of recieptUrl to download the proof:
http://localhost:8093/ebics/receipt_XYZ.json