In the United States, the Controlling the Assault of Non-Solicited Pornography and Marketing Act of 2003 (popularily called the "CAN-SPAM" Act) provides that "       (a) IN GENERAL- Not later than 6 months after the date of enactment of this Act, the Commission shall transmit to the Senate Committee on Commerce, Science, and Transportation and the House of Representatives Committee on Energy and Commerce a report that--

            (1) sets forth a plan and timetable for establishing a nationwide marketing Do-Not-E-Mail registry;

            (2) includes an explanation of any practical, technical, security, privacy, enforceability, or other concerns that the Commission has regarding such a registry; and

            (3) includes an explanation of how the registry would be applied with respect to children with e-mail accounts.

      (b) AUTHORIZATION TO IMPLEMENT- The Commission may establish and implement the plan, but not earlier than 9 months after the date of enactment of this Act."

By definition, "The Commission" means the Federal Trade Commission.

So, there is NO official do-not-spam registry yet and there won't be for awhile.