Tom Critchlow on twitter.com:haven't come across http://indiebookclub.biz before. Can you link to an example profile?
Mine is https://indiebookclub.biz/users/gregorlove.com. My site supports Micropub, so each entry links to the canonical post on my site. If a site doesn’t support Micropub, the permalink is on indiebookclub. You should be able to log in with your domain if you want to try it out!
Some more information in the announcement post: https://gregorlove.com/2018/06/announcing-indiebookclub/