Courtesy: Generated By AI
Anthropic Music Copyright Lawsuit: Sony Music Publishing, Warner Chappell Music and affiliated publishers have sued artificial intelligence company Anthropic, accusing it of unlawfully obtaining and using tens of thousands of copyrighted musical compositions in connection with its Claude AI models.
The lawsuit was filed on August 28 in the US District Court for the Northern District of California and names Anthropic, chief executive and co-founder Dario Amodei, and co-founder Benjamin Mann as defendants. The federal docket lists the case as a copyright action and shows that the plaintiffs have demanded a jury trial.
Anthropic disputes the publishers' allegations and says it intends to defend itself in court.
What are Sony and Warner accusing Anthropic of doing?
The publishers allege that Anthropic engaged in large-scale torrenting, scraping and downloading of copyrighted material as it developed and operated its Claude models.
According to the complaint, the allegedly affected catalogue runs into tens of thousands of musical compositions, making the lawsuit substantially broader than some earlier music copyright cases against Anthropic.
The publishers allege that copyrighted compositions were copied as inputs used in developing Claude and that protected material can also appear in the AI system's outputs.
Songs cited in reporting on the complaint include Ain't No Mountain High Enough, All I Want for Christmas is You, Eye of the Tiger, Livin' on a Prayer, September, Hallelujah, Uptown Funk and Taylor Swift's Paper Rings.
These allegations have not been established as facts by the court in the newly filed case.
Why does the lawsuit involve alleged piracy?
A significant part of the publishers' case concerns not simply whether copyrighted works were used for AI training, but how Anthropic allegedly acquired material used in its datasets.
The complaint draws on evidence that emerged during earlier litigation involving authors and Anthropic.
It alleges that Mann used BitTorrent in 2021 to obtain at least five million books from Library Genesis, commonly known as LibGen. It further alleges that Anthropic employees obtained at least another two million books from Pirate Library Mirror in 2022.
The music publishers argue that the material acquired through those sources included copyrighted musical works.
They also allege that Anthropic obtained lyrics through other sources, including licensed lyric services, and used datasets and web-based sources in assembling material for its AI systems.
The distinction between using copyrighted material for AI training and acquiring that material through allegedly pirated sources could prove important as the case proceeds.
How much could Anthropic face in damages?
The publishers are seeking statutory damages of up to $150,000 for each work they say was wilfully infringed.
They are also seeking up to $25,000 for alleged violations involving the removal or alteration of copyright management information.
With tens of thousands of compositions potentially at issue, the theoretical damages claimed under US copyright law could run into billions of dollars. The final financial exposure, however, would depend on which claims and works, if any, ultimately succeed.
The plaintiffs are also seeking a jury trial and other relief, including destruction of allegedly infringing copies and information concerning Claude's training data.
Why is this case particularly significant?
The lawsuit adds another major music publishing group to a widening series of copyright disputes surrounding Anthropic.
Universal Music Publishing Group, Concord Music Group and ABKCO previously brought litigation against the company. A separate lawsuit filed in January 2026 covered more than 20,000 works and sought damages exceeding $3 billion.
BMG later sued Anthropic over hundreds of compositions, while Round Hill Music filed another case in August involving copyrighted songs allegedly used to train Claude.
Sony Music Publishing and Warner Chappell's entry means Anthropic is now confronting copyright litigation involving publishing interests connected with all three major music groups.
The latest complaint is also unusually broad because it connects alleged infringement involving individual musical compositions with the wider question of how large datasets used to develop generative AI systems were assembled.
What does Anthropic say?
Anthropic rejects the publishers' allegations.
"We disagree with the publishers' claims and we intend to defend ourselves robustly in court," the company said in a statement reported by Axios and other publications.
That response is important because the publishers' descriptions of Anthropic's conduct are allegations contained in a civil complaint. The new case has not produced a ruling establishing that Anthropic infringed the works identified by Sony Music Publishing and Warner Chappell.
The bigger fight over AI training and copyright
The dispute arrives amid a much broader legal battle over whether, and under what circumstances, technology companies can use copyrighted material when developing generative AI systems.
Music presents an especially complicated copyright landscape. A commercially released song can involve separate rights covering its composition, lyrics and sound recording, and those rights can be held by different parties.
That structure potentially gives different copyright owners separate grounds on which to challenge the use of the same underlying music.
For AI developers, the case therefore goes beyond whether a model can reproduce protected lyrics. Courts are increasingly being asked to examine where training material came from, how it was acquired and whether the resulting AI systems reproduce protected material.
For publishers and songwriters, the dispute centres on whether AI developers must obtain licences and compensate copyright owners when protected works are incorporated into commercial AI development.
The Sony Music Publishing and Warner Chappell lawsuit is now at the opening stage. Anthropic has denied the claims, and the court will have to determine which allegations, if any, amount to copyright violations.
