DENVER — The Public Media Platform is moving into the next phase of its CPB grant, shifting its focus to developing a sustainable business plan and more ways for public media stations to access the content. PMP Executive Director Kristin Calhoun announced the project’s next phase July 9 during the “Digital Day” conference leading up to the Public Media Development and Marketing Conference in Denver. CPB’s five-year, $8 million grant to PMP provided $6 million for the nearly completed build-out and $2 million for the “operational phase,” which winds down on an incremental basis through 2016, according to Michael Levy, CPB executive v.p. of public affairs. The PMP is an application programming interface (API) that provides easy access to both public radio and public television digital content. Public media’s top distributors — NPR, PBS, Public Radio International, American Public Media and Public Radio Exchange — have guided its build-out phase as project partners; they will continue their support, Calhoun said.