Sony Music Publishing and Warner Chappell Music have sued AI firm Anthropic, alleging massive copyright infringement in the training of its Claude AI model. The complaint accuses the company and its founders of building their technology on the illegal use of thousands of musical compositions. This legal action is a critical development, as it means all major music publishers are now litigating against the prominent AI developer over its data practices.
Escalating Legal Battles for Anthropic
The lawsuit, filed on August 28 in the US District Court for the Northern District of California, names Anthropic as well as its co-founders, Dario Amodei and Benjamin Mann, as defendants. It claims the company illegally harvested innumerable copyrighted works, including iconic songs like “All I Want for Christmas is You” and “Eye of the Tiger.” The publishers are seeking a jury trial and demanding the destruction of all infringing copies of their works used by the AI firm.
This filing solidifies a united front from the music industry against the AI company's practices. Universal Music Publishing Group, Concord, and ABKCO initiated legal action in October 2023, followed by separate suits from BMG and Round Hill Music. With Sony and Warner Chappell now joining, the entirety of the major music publishing sector is challenging the legality of Claude's training data, signaling a widespread industry-wide concern over unauthorized content use.
Allegations of Widespread Piracy
At the heart of the complaint are accusations of systematic piracy on an industrial scale. The publishers allege that Anthropic employees, including co-founder Benjamin Mann, used BitTorrent to download millions of pirated books from illicit online libraries like Library Genesis. These pirated materials, which contained the lyrics to countless songs, were then allegedly used as core inputs to train the Claude AI models without any authorization.
The lawsuit references evidence from a prior authors' case where a judge called the company's actions "straightforward piracy but at massive scale." The filing also cites unsealed internal communications, including one where co-founder Benjamin Mann described a pirated library as "sketchy AF." This evidence is used to argue the company knowingly used illicit data sources for model training.
Beyond torrenting, the complaint alleges Anthropic employed other infringing methods to gather data. These include scraping lyrics from licensed websites like MusixMatch and LyricFind and conducting a "destructive scanning" operation on second-hand books. These actions allegedly demonstrate a multi-pronged effort to acquire vast amounts of copyrighted text without permission from rightsholders.
Significant Financial and Reputational Stakes
The financial implications for Anthropic are staggering, as the publishers are seeking statutory damages of up to $150,000 for each work willfully infringed. Given the "tens of thousands" of compositions allegedly involved, the potential liability could easily run into the multi-billion-dollar range. The suit also demands up to $25,000 for each instance of alleged removal or alteration of copyright management information from the works.
The lawsuit directly challenges Anthropic's public image as an "ethical AI company," contrasting this branding with what the complaint calls a "brazen campaign" of theft. It cites a previous $1.5 billion settlement with authors as evidence that such penalties are viewed merely as a business expense. This is argued as insufficient to deter a company with a reported $2 trillion valuation built on mass infringement.
This wave of litigation places Anthropic at the center of a critical debate over copyright in the age of artificial intelligence. While publishers state they are open to licensing for ethical AI, this lawsuit underscores their resolve to protect intellectual property from unauthorized use. The outcome will likely set a major precedent for how generative AI models can be legally trained and the responsibilities AI companies have toward creators.
Source: Music Business Worldwide