Method and device for supplying of a data set stored in a database to supply of a data set, e.g. the content of a copy protected audio CD, which is stored in a database, e.g. to a user PC on which said content of a copy protected audio CD cannot be accessed, the following steps are performed: receiving a serial code of a set of serial codes assigned to said data set, verifying of said received serial code, in case of a positive verification, accessing said data set correspond to said received and positively verified serial code from said database and outputting of at least parts of said accessed data.