Law and standards
The statutes and industry standards the royalty system runs on.
DDEX
DDEX (Digital Data Exchange) is a not-for-profit standards organization, formed in 2006, that defines the message formats music companies use to exchange data in the digital supply chain. Its best-known standard is the Electronic Release Notification (ERN), the XML format in which labels and distributors deliver releases and their metadata to streaming services and stores.
Music Modernization Act
The Music Modernization Act (MMA) is a United States copyright law signed on October 11, 2018 as Public Law 115-264. It created a blanket mechanical license for digital music services administered by the Mechanical Licensing Collective, extended federal protection for digital uses to sound recordings made before 1972, and gave producers and engineers a statutory path to SoundExchange royalties.