17 U.S.C. § 408: Copyright registration in general

At any time during the subsistence of the first term of copyright in any published or unpublished work in which the copyright was secured before January 1, 1978 , and during the subsistence of any copyright secured on or after that date, the owner of copyright or of any exclusive right in the work may obtain registration of the copyright claim by delivering to the Copyright Office the deposit specified by this section, together with the application and fee specified by sections 409 and 708. Such registration is not a condition of copyright protection. in the case of an unpublished work, one complete copy or phonorecord; in the case of a published work, two complete copies or phonorecords of the best edition; in the case of a work first published outside the United States, one complete copy or phonorecord as so published; in the case of a contribution to a collective work, one complete copy or phonorecord of the best edition of the collective work. The Register of Copyrights is authorized to specify by regulation the administrative classes into which works are to be placed for purposes of deposit and registration, and the nature of the copies or phonorecords to be deposited in the various classes specified. The regulations may require or permit, for particular classes, the deposit of identifying material instead of copies or phonorecords, the deposit of only one copy or phonorecord where two would normally be required, or a single registration for a group of related works. This administrative classification of works has no significance with respect to the subject matter of copyright or the exclusive rights provided by this title. if the deposit consists of one copy of the entire issue of the periodical, or of the entire section in the case of a newspaper, in which each contribution was first published; and if the application identifies each work separately, including the periodical containing it and its date of first publication. the renewal claimant or claimants, and the basis of claim or claims under section 304(a), is the same for each of the works; and the works were all copyrighted upon their first publication, either through separate copyright notice and registration or by virtue of a general copyright notice in the periodical issue as a whole; and the renewal application and fee are received not more than twenty-eight or less than twenty-seven years after the thirty-first day of December of the calendar year in which all of the works were first published; and the renewal application identifies each work separately, including the periodical containing it and its date of first publication. The Register may also establish, by regulation, formal procedures for the filing of an application for supplementary registration, to correct an error in a copyright registration or to amplify the information given in a registration. Such application shall be accompanied by the fee provided by section 708, and shall clearly identify the registration to be corrected or amplified. The information contained in a supplementary registration augments but does not supersede that contained in the earlier registration. Registration for the first published edition of a work previously registered in unpublished form may be made even though the work as published is substantially the same as the unpublished version. Not later than 180 days after the date of enactment of this subsection, the Register of Copyrights shall issue regulations to establish procedures for preregistration of a work that is being prepared for commercial distribution and has not been published. The regulations established under paragraph (1) shall permit preregistration for any work that is in a class of works that the Register determines has had a history of infringement prior to authorized commercial distribution. an application for registration of the work; a deposit; and the applicable fee. 3 months after the first publication of the work; or 1 month after the copyright owner has learned of the infringement.