Can Elizabeth Music Group Master Royalties work with producers who already have a publisher?

Yes. Master royalties and publishing royalties are separate, so an existing publisher does not automatically prevent master-side collection.

Publishing relates to the underlying composition. Master royalties relate to the recording and depend on the rights and contractual terms involved. A producer might receive publishing royalties through a publisher while also holding producer points under a label agreement. Elizabeth Music Group Master Royalties focuses on reviewing those master-side entitlements and the related accounting.