SoundExchange, explained: the US digital radio royalty you only get if you register
SoundExchange collects US royalties when recordings play on non-interactive digital services such as SiriusXM, Pandora and iHeartRadio. Registration is free and open to artists outside the US, but unclaimed money expires after three years, and self-releasing artists who register only as performers leave the larger share behind.
Industryvia Legal Information Institute, Cornell Law School