The u-listen-of, aka a Scrobble https://indieweb.org/scrobble, is published by the Post Kinds plugin and consumed by the Semantic Linkbacks plugin for WordPress.

https://david.shanske.com/2018/05/08/an-indieweb-podcast-episode-4-webmentions-and-privacy/#comments

In below, my site consumed listen-of from several different sites.