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!
Responses★ Brendan Schlagel,
Some more information in the announcement post: https://gregorlove.com/2018/06/announcing-indiebookclub/