; and (II) such other information relating to the identity and ownership of musical works (and shares of such works) as the Register of Copyrights may prescribe by regulation. (iv) Sound recording information Each musical work copyright owner with any musical work listed in the musical works database shall engage in commercially reasonable efforts to deliver to the mechanical licensing collective, including for use in the musical works database, to the extent such information is not then available in the database, information regarding the names of the sound recordings in which that copyright owner’s musical works (or shares thereof) are embodied, to the extent practicable. (v) Accessibility of database The musical works database shall be made available to members of the public in a searchable, online format, free of charge. The mechanical licensing collective shall make such database available in a bulk, machine-readable format, through a widely available software application, to the following entities: (I) Digital music providers operating under the authority of valid notices of license, free of charge. (II) Significant nonblanket licensees in compliance with their obligations under paragraph (6), free of charge. (III) Authorized vendors of the entities described in subclauses (I) and (II), free of charge. (IV) The Register of Copyrights, free of charge (but the Register shall not treat such database or any information therein as a Government record). (V) Any member of the public, for a fee not to exceed the marginal cost to the mechanical licensing collective of providing the database to such person. (vi) Additional requirements The Register of Copyrights shall establish requirements by regulations to ensure the usability, interoperability, and usage restrictions of the musical works database. (F) Notices of license and nonblanket activity (i) Notices of licenses The mechanical licensing collective shall receive, review, and confirm or reject notices of license from digital music providers, as provided in