There is a portfolio button on artists box. If you want to set each portfolio button to a separate URL;
1)Go to Appearance->Theme Settings->General and select “Remove Artists portfolio links” box.
2)Now you can add a custom button to each artist box with the following code;
<a href='YOURLINK'>Click Here</a>
Don’t forget to change “YOURLINK” text with your link.For example;
<a href='http://www.themeforest.net'>Click Here</a>