The Stockholm district court sentenced Gottfrid Svartholm Warg, Peter Sunde, Fredrik Neij and Carl Lundstrom to one year each in prison for "assisting making available copyrighted content."

They were also ordered to pay damages of 30 million kronor ($4.3 million Cdn) to a number of entertainment companies, including Warner Bros., Sony Music Entertainment, EMI and Columbia Pictures.

But the group said any verdict would be appealed, and the website home page carried a message equally defiant:

"As in all good movies, the heroes lose in the beginning but have an epic victory in the end anyhow," said a message posted to the site. "That's the only thing Hollywood ever taught us."

Peter Sunde, one of the four founders of the site, said in a video posted Friday the court's ruling was "bizarre."

"It's so bizarre we just have to laugh about it, it's unreal," he said.

As for the damages awarded, Sunde said the number was meaningless.

"They could have gotten one billion," he said. "We can't pay and we won't pay."

Hollywood welcomes decision

The Pirate Bay website connects BitTorrent networks to allow users to swap music, video or game files, but the site's founders had argued they were not responsible for the files they directed users toward, since they themselves did not host any of the files.

However, the court found the defendants guilty of aiding in the committing of copyright offences "by providing a website with - sophisticated search functions, simple download and storage capabilities, and through the tracker linked to the website."

The Motion Picture Association of America chairman and CEO Dan Glickman said his organization welcomed the decision.

"This is an important decision for rights-holders, underlining their right to have their creative works protected against illegal exploitation and to be fairly rewarded for their endeavours," Glickman said in a statement.

Michael Masnick, who runs the influential technology blog Techdirt and is a frequent critic of the recording industry's methods of dealing with alternative forms of content distribution, said in a blog post Friday the decision raises questions about the culpability of providers of online search tools.

"The idea that a toolmaker can be liable for the actions of its users should trouble everyone - especially when the tools have plenty of legitimate uses as well," he wrote.

As copyright law is carried out domestically, the decision isn't likely to have an effect on other countries, nor is it likely to discourage file-sharing, said University of Ottawa professor Michael Geist in a blog post Friday.

But he said the decision could be used to encourage internet service providers and search engines "to play more active roles in policing their networks."

With files from The Associated Press