Something I didn't fully grasp until I mapped it out — your PRO only handles one type of royalty. performance royalties. that's it. the MLC handles mechanical royalties from streaming. SoundExchange handles digital performance royalties in the US. CMOs handle neighboring rights across different territories globally. I was registered with one organization and assumed that covered everything. it doesn't. It’s why this MUSIC OS Series I’ve been building includes a Societies reference database — PROs, CMOs, MROs — with CISAC codes and territory coverage. so you can see which organizations you should be registered with, not just the one you already know. The money you're not collecting isn't non-existent or disappearing into thin air, it's sitting somewhere you haven't registered to receive it yet.