AUCKLAND - The founder of file-sharing website Megaupload was ordered to be held in custody by a New Zealand court on Monday, as he denied charges of internet piracy and money laundering and said authorities were trying to portray the blackest picture of him.

Megaupload founder Kim Dotcom appears in Auckland's North Shore District Court after his arrest in this still image taken from a January 20, 2012 video. [Photo/Agencies]

Prosecutor Anne Toohey argued at a bail hearing that Kim Dotcom, a German national also known as Kim Schmitz, was a flight risk "at the extreme end of the scale" because it was believed he had access to funds, had multiple identities and had a history of fleeing criminal charges.

"The FBI believes the sums located are unlikely to represent all the overseas bank accounts owned by Mr Dotcom," she said.

But Dotcom's lawyer said he posed no threat of absconding or restarting his businesses, arguing that his client had cooperated fully, his passports had been seized and his funds frozen, and also that he had a distinctive appearance.

"He is not the sort of person who will pass unnoticed through our customs and immigration lines and controls," said defence lawyer Paul Davison of the former hacker, reportedly 2 metres (6ft 6ins) tall and weighing more than 130 kg (285 lbs).

Judge David McNaughton said the bail application was too complicated for an immediate ruling, adding he would issue a written decision no later than Wednesday.

"Given the breadth of issues covered in this bail application and the seriousness of the issues, I am going to reserve my decision," the judge said.  

U.S. authorities want to extradite Dotcom on charges he masterminded a scheme that made more than $175 million in a few short years by copying and distributing music, movies and other copyrighted content without authorisation. Megaupload's lawyer has said the company simply offered online storage.  

Prosecutor Toohey said two other men sought on global warrants for involvement in Megaupload had been arrested in Europe.  

BARRICADED IN SAFE ROOM

Dotcom, 38, and three others, were arrested on Friday after New Zealand police raided his country estate at the request of the U.S. Federal Bureau of Investigation. Police cut Dotcom out of a safe room he had barricaded himself in, because, according to his layer, he was frightened and panicked.  

Dotcom smiled and waved at around 20 supporters who filled the courtroom and spoke to them after the judge's decision.

"Hey guys thanks for turning up, I appreciate it," he said, wishing a female supporter a "happy birthday".

Defence lawyer Davison said Dotcom was "realistic about what is happening".

"He would obviously prefer to be at large. He doesn't want to be there any longer than he absolutely has to be," he told reporters outside the court.

Media reported that Dotcom ordered around NZ$4 million ($3.2 million) of renovations to the sprawling mansion that he leased near Auckland, with its manicured lawns, fountains, pools, palm-lined paths and extensive security.  

The case is being heard as the debate over online piracy reaches fever pitch in Washington, where Congress is trying to craft tougher legislation.    

Lawmakers stopped anti-piracy legislation on Friday, postponing a critical vote in a victory for Internet companies that staged a mass online protest against the fast-moving bills.

The movie and music industries want Congress to crack down on Internet piracy and content theft, but major Internet companies such as Google and Facebook have complained that current drafts of the legislation would lead to censorship.

Critics of the U.S. Stop Online Piracy Act, or SOPA, and Protect IP Act (PIPA), quickly showed their opposition to the shutdown of Megaupload.com, with hackers attacking the public websites of the Justice Department, the world's largest music company Universal Music, and the two big trade groups that represent the music and film industries.