Is it possible to use HTML Widget to play whole song if we use paid account?

We already have client ID and client secret and want to play music with HTML widget. As we found the HTML widget can only play 30 seconds of a song. How to play the whole song if a paid user would like to play?

As I know, You need to be a KKBOX partner. That means, You should contact a guy and sign a contract for the purpose you described. Otherwise, there is no way to do something like this.