Google processed more than 345 million requests to remove links to pirated content last year, according to analysis by filesharing website TorrentFreak.
Publicly released data showed that websites such as 4shared, Rapidgator and uploaded.net were the top domains subject to link takedown requests, claiming 8.3 million, 7.8 million and 5.4 million respectively.
BPI, which represents the British music industry, was responsible for 60 million reported links by itself, making it the most active body in pursuing the takedown of links to pirated content.
While most of the requests were honoured, Google maintains an online database of links which it took no action against, showing that some submissions were denied if found not to be infringing or having been previously removed.
Takedown requests relating to copyright have surged in recent years, with weekly requests to Google increasing from 190,000 in the last week of 2011 to 7.8 million in the last week of 2014.
The rise comes amid criticism last year from British MPs that the search engine is not doing enough to protect intellectual property, as well as the blocking of piracy websites by British ISPs.
Google has maintained that piracy is best mitigated by improving delivery methods of legitimate services. A report last year from the firm argued: "The right combination of price, convenience, and inventory will do far more to reduce piracy than enforcement can."
