Spectrum Protocol is a decentralized blockchain-powered platform and e-commerce network for the music & entertainment industry. The foundation of the platform is a distributed ledger for registering copyrights, licensing arrangements and royalty allocations at the licensor side. The ledger provides a verifiable record of copyrights ownership - which any third-parties will be able to inspect. Upon this foundation, we will build a licensing agreement registration and payment system within the protocol that can receive royalty payments and distribute royalties according to royalty allocations at the licensor side. Costs of registration will be kept low, to assure pervasive adoption. Bulk loading for industry participants will also be supported. The Spectrum Protocol platform is designed to be inclusive, to benefit all participants in the music and entertainment industry, including labels and record companies, independent artists, digital music platforms, collective management organizations, aggregators, distributors, publishers, artist management companies, composers, lyricists and concert organizers.