That might be a winter project for me. I lost my CD log when my computer crashed a little while ago and foolishly didn't back it up. This site looks legit to store stuff like that.
It's great. Scanning items in (if they have a barcode, relatively early stuff doesn't!) makes it easier but you might be surprised how many very similar editions use the same barcode and you then have to spend time identifying the exact version you have (by looking at the matrix/runout, SID codes etc). It can be quite arduous work.
It can lead to some really curious discoveries. I've still no idea on the origin of my copy of the the non-remastered recording of Vapor Trails (Rush), for example. Here's the release I probably have: https://www.discogs.com/Rush-Vapor-Trails/release/524671 but here's my note from cataloguing it: Well, this is strange! My CD has no catalogue number, no barcode, no label, no matrix/runout (or any other such markings in the spindle area). There's no label detail in the booklet, either. It does look like an official release, though, so I am completely stumped.
This. I'm systematically putting all my music on a network hard drive, then I enter the CD/LP/DVD/BR into Discogs. I just finished "Sting" last night. I can't access it at work, so I can't show my "values", but it's in the ballpart of ProfessorPeart. I find it incredibly interesting on a couple levels. One, that there are a lot of sloppy people (hahaha) but two, that there are so many variations on what you would THINK would be a simple matter: Company presses 9 gazillion CDs, puts them in boxes, then sells them. Nope. I've also learned about IFPI codes, glass mastering (the process of making the stamp from which all the CDs are made), etc. etc.
I'm also sort of happy that I'm about 2,000 CDs in more or less, and I've only found ten Russian/counterfeit CDs. Four I knew about when I bought them, two I strongly suspected but hoped for the best, and four that I'm kind of surprised/bummed about (including two that were purchased "new").