A UN treaty that brings world copyright law into the digital age by protecting authors on the Internet will come into force in March.
Another treaty will be the first global accord to protect the rights of recording artists and producers.
"This is an important day in the history of copyright, making it better equipped to meet the technological challenges of cyberspace," said Mr Kamal Idris, director-general of the UN's World Intellectual Property Organization.
The pair of treaties will enable "composers, artists, writers and others to use the Internet with confidence to create, distribute and control the use of their works within the digital environment," he said.
Negotiators said the treaties were essential for an age when digital copies of music can be made almost instantaneously anywhere by computer.
IFPI, an organization representing the global recording industry, welcomed the announcement as "an important milestone," and said it hoped ratification of the second treaty would follow shortly.
"By ratifying the WIPO Copyright Treaty, governments in 30 countries have shown their commitment to ensuring the future success of the music industry and many other creative sectors in the digital environment," said Jay Berman, chairman of IPFI.
AP