Hey, I am still under trial. I have seen several mentions referencing the Discogs db, but I haven’t seen it suggested to link a user’s personal account. I’m picturing any album or track search would show a little icon or note that says “You have this album in your physical collection [Vinyl, CD, SACD, etc.]” - or something along those lines. If you have a large collection, you may have forgotten it is on a shelf somewhere - or you if you have company over and they are like “that’s an awesome record” you can see that you own it and go pull it out.