Course piracy can spread through public Telegram channels, posts, invite pages and linked file hosts.
Save public evidence
Keep the public URL, channel or post name, screenshots, copied course details and linked download pages where available.
Follow connected links
A public post may point to a separate file host or sales page. Those connected services may provide additional reporting routes.
Know the limits
Private groups are different. A protection service should not promise automatic access to material that is not public or otherwise lawfully accessible.