The lawsuit was filed August 28th in the U.S. District Court for the Northern District of California and names Anthropic CEO Dario Amodei and co-founder Benjamin Mann as individual defendants alongside the company. The publishers allege Anthropic obtained copyrighted works through torrenting, web scraping, third-party datasets and other methods without permission or payment.

The complaint covers music associated with artists and songwriters ranging from The Beatles and Michael Jackson to Taylor Swift, Mariah Carey and Bon Jovi. Music Business Worldwide places the filing inside a widening legal battle between major music publishers and Anthropic over the material used to develop Claude.

Anthropic disputes the allegations. “We disagree with the publishers’ claims,” a company spokesperson told TechCrunch, adding that the company intends to defend itself.

The case reaches beyond the increasingly familiar question of whether copyrighted work can be used to train generative AI. Sony and Warner are also challenging how Anthropic allegedly obtained the material in the first place, putting piracy, training copies, Claude’s outputs and music-publishing rights inside the same dispute.

The Lawsuit Targets Songs, Not Master Recordings

The rights at issue are important because “music copyright” can describe different assets.

A commercially released song commonly involves at least two major copyright layers. One covers the sound recording, often controlled by a label or artist. Another covers the underlying composition, including lyrics and musical notation, typically administered by songwriters and music publishers.

The new Anthropic lawsuit comes from the publishing side.

Sony Music Publishing and Warner Chappell are not alleging simply that Claude copied finished commercial recordings by famous performers. Their claims concern copyrighted musical compositions contained in lyrics, sheet music, books, websites and other material Anthropic allegedly copied while developing its AI systems.

Reuters identifies works associated with The Beatles, Taylor Swift and Michael Jackson among the material cited in the case.

That distinction separates the lawsuit from cases aimed at generative music services over alleged copying of commercial sound recordings. A composition can be protected independently of any particular recording of it.

For publishers and songwriters, lyrics and written music are therefore training material in their own right rather than incidental information surrounding a master recording.

The Publishers Say Anthropic Pirated Training Material

The sharpest allegation concerns acquisition.

Sony and Warner’s publishers accuse Anthropic of using torrenting, shadow libraries, web scraping and other methods to assemble copyrighted material without licenses. The allegations connect the music case to earlier disputes over large collections of pirated books used in AI development.

Among the sources identified in reporting on Anthropic’s training libraries are shadow libraries including Library Genesis and Pirate Library Mirror. Collections obtained through those services allegedly included books containing copyrighted lyrics and musical notation controlled by publishers.

Other material was allegedly acquired through scraped websites, third-party datasets and digitized physical works.

The publishers’ theory separates two acts that can easily become blurred in AI copyright debates: obtaining a copyrighted copy and subsequently using that copy for model development.

That distinction has already mattered in litigation involving authors. TechCrunch’s legal overview notes that earlier proceedings distinguished the question of AI training from the separate issue of obtaining books through piracy.

The music publishers are now attempting to put that acquisition question directly at the center of a dispute over songs.

Amodei and Mann are personally named as part of that theory. The publishers allege Mann participated in obtaining pirated material and that Amodei was involved in directing the conduct. Those are allegations in the complaint, not findings of personal liability.

Naming company executives makes the filing more specific than a claim that copyrighted works simply appeared somewhere inside a vast dataset. The publishers are alleging identifiable decisions about how data was collected and retained.

Claude’s Outputs Are Part of the Case Too

The claims do not stop at Anthropic’s training library.

Sony and Warner also allege Claude can reproduce protected lyrics verbatim and generate material substantially similar to copyrighted compositions. That gives the lawsuit another layer beyond what happened before a model was trained.

Reuters’ review of the filing says the publishers accuse Claude of reproducing lyrics and generating material that can compete with the original works.

The complaint also raises claims involving copyright management information under the Digital Millennium Copyright Act. Publishers allege identifying or ownership information connected to protected works was removed or altered during Anthropic’s copying process.

The case therefore presents several legal theories rather than one abstract claim called “AI copyright”: allegedly unlawful acquisition, copying for model development, potentially infringing outputs and treatment of copyright-management information.

Anthropic disputes the publishers’ case, and none of those allegations has been established as fact by a court.

All Three Major Publishing Groups Are Fighting Anthropic

Sony Music Publishing and Warner Chappell are entering a legal fight that already includes Universal Music Publishing Group and other publishers.

Universal, Concord Music Group and ABKCO first sued Anthropic in 2023 over Claude’s alleged reproduction of copyrighted lyrics. That dispute initially involved roughly 500 works and continued through amended complaints and procedural fights.

A later case expanded the conflict dramatically, adding allegations over Anthropic’s acquisition of copyrighted material through torrenting and seeking substantial damages over a much larger group of works.

With Sony and Warner publishing companies now pursuing their own claims, publishing operations associated with all three major music groups are involved in litigation against Anthropic.

MBW’s coverage places the August 28th filing inside that broader campaign rather than treating it as the music industry’s first confrontation with Claude.

The lawsuits are not interchangeable. They involve different plaintiffs, catalogs, works and allegations, and each case has its own procedural history.

Together, however, they show music publishers pressing courts on two related questions: whether copyrighted compositions can be copied for generative AI training without licenses and whether the source of those training copies changes the legal analysis.

Fair Use May Not Answer the Piracy Question

Fair use remains central to AI copyright litigation, but Anthropic’s legal battles demonstrate why it may not answer every part of the dispute.

AI developers have argued that model training can be transformative because systems analyze large collections of material to identify patterns rather than distributing ordinary substitute copies of each work to consumers. Copyright owners argue that copying protected material at scale without licenses deprives creators and rightsholders of control and can contribute to systems capable of reproducing or competing with their work.

The Anthropic cases introduce another question before that debate is resolved: where did the training copy come from?

In earlier litigation involving authors, a federal judge distinguished between using copyrighted books for AI training and maintaining a library assembled from pirated books. That distinction gives Sony and Warner a legal strategy that does not depend entirely on convincing a court that every act of AI training is inherently infringing.

The publishers can separately challenge alleged torrenting and other acquisition methods.

Whether they can prove those allegations for the musical compositions in this case remains for the court to decide.

The Potential Damages Reach Into the Billions

The scale of the requested relief reflects the number of copyrighted works the publishers say are involved.

U.S. copyright law can permit statutory damages of as much as $150,000 for each work found to have been willfully infringed. The complaint also seeks additional relief connected to alleged violations involving copyright management information.

Those maximum statutory figures should not be mistaken for money Anthropic has already been ordered to pay. No damages have been awarded, and the publishers still have to establish their claims and entitlement to relief.

The potential exposure nevertheless becomes enormous when damages can be calculated work by work across a large music catalog, which is why the dispute has been described as potentially multibillion-dollar litigation.

Publishers are also seeking injunctive relief that could affect Anthropic’s future use of protected material, along with remedies concerning allegedly infringing copies and information about training data.

For the AI business, those requests matter beyond a single damages calculation. A ruling that restricts how copyrighted compositions can be acquired or retained for training could influence how future datasets are assembled before a model is ever released.

Music Publishing Could Push AI Toward Licensing

The Anthropic music lawsuit arrives while rightsholders across books, journalism, visual art and other creative fields are testing how existing copyright law applies to generative AI.

Music publishing brings a particularly mature licensing system into that argument. Publishers already administer permissions and payments across streaming, reproduction, synchronization, public performance and numerous other uses of compositions.

AI training creates a different kind of demand for enormous catalogs of material.

If courts conclude that some forms of training require authorization, or that companies cannot build training libraries from unlawfully obtained copies, AI developers could face growing pressure to negotiate scalable licenses with publishers before using large song catalogs.

That outcome is not predetermined by the Sony and Warner case. Anthropic disputes the allegations, and courts are still developing rules around different kinds of AI copying and training.

What the filing does establish is how aggressively major music publishers are trying to shape those rules before industry practices harden around them.

Sony Music Publishing and Warner Chappell are effectively arguing that building Claude does not create a copyright-free zone around musical compositions, particularly when the copies themselves were allegedly obtained from unauthorized sources.

Anthropic will have the opportunity to contest both the factual allegations and the publishers’ legal theories.

The immediate question is therefore narrower than whether artificial intelligence and music can coexist. Courts will have to examine what Anthropic actually copied, where those copies came from, how they were used, what Claude can reproduce and which copyright rules apply at each stage.

For music publishers, that distinction could be decisive. The fight is no longer only about whether an AI model has encountered a copyrighted song.

It is increasingly about how that song entered the machine.

The transaction closed July 15th after receiving regulatory approvals in multiple territories. Sony completed the purchase through the music-rights investment venture it formed with GIC, Singapore’s sovereign wealth fund.

Financial terms were not officially disclosed. When the agreement was announced in May, however, Reuters reported that a source familiar with the transaction valued it at around $4 billion.

Recognition Music Group is the company built from music assets formerly associated with Hipgnosis, the catalog-investment operation that spent years acquiring interests in commercially durable songs and helped push music rights deeper into institutional finance.

The scale is substantial. Recognition’s portfolio encompasses more than 45,000 songs across approximately 150 catalogs, Loeb & Loeb notes, with interests connected to songs including Journey’s “Don’t Stop Believin’,” Fleetwood Mac’s “Go Your Own Way,” Beyoncé’s “Single Ladies (Put a Ring on It),” Lady Gaga’s “Bad Romance” and Mariah Carey’s “All I Want for Christmas Is You.”

The acquisition was first announced in May. July 15th marks the point when the transaction actually closed and the portfolio moved into the Sony-GIC venture.

Hipgnosis Helped Turn Songs Into Investment Assets

Before Recognition Music Group existed under its current name, Hipgnosis became one of the defining forces of the music-catalog buying boom.

Founded by Merck Mercuriadis, Hipgnosis built its strategy around the idea that established songs could produce recurring income for decades, making copyrights attractive long-term assets rather than simply pieces of music-industry inventory.

Streaming strengthened that argument. Catalog songs that once depended heavily on radio, physical reissues and synchronization could generate revenue every time listeners returned to them on subscription services.

Institutional money followed.

Blackstone spent more than $700 million building music assets through Hipgnosis Songs Capital from 2021, Music Business Worldwide details. In July 2024, Blackstone acquired the publicly traded Hipgnosis Songs Fund from its shareholders for $1.58 billion, giving that portfolio an estimated enterprise value of roughly $2.2 billion.

The assets were later consolidated under the Recognition Music Group name as the corporate structure around Hipgnosis changed.

Those numbers help explain why Sony’s acquisition is more than another catalog purchase. Recognition represents a collection of rights assembled during the period when major financial institutions increasingly began treating successful songs as an investment category of their own.

Fleetwood Mac Shows What Sits Inside the Portfolio

Fleetwood Mac provides one of the clearest examples of what Recognition assembled.

Hipgnosis acquired Lindsey Buckingham’s publishing interests in a 161-song catalog in 2021, including his interests in Fleetwood Mac compositions such as “Go Your Own Way.” Christine McVie’s catalog interests joined the portfolio later that year.

Those deals gave the business exposure to much of the songwriting associated with Fleetwood Mac’s commercially dominant decades.

Recognition’s reach extends much further. The portfolio includes interests associated with Journey’s “Don’t Stop Believin’,” Bruno Mars’ “Locked Out of Heaven,” Leonard Cohen’s “Hallelujah,” Prince’s “Kiss,” Rihanna’s “Umbrella,” Shakira’s “Whenever, Wherever” and other songs spanning several generations of popular music, the original deal announcement shows.

A composition such as “Go Your Own Way” does not depend on Fleetwood Mac releasing another album to remain commercially active. It can continue generating publishing income through streaming, radio, public performance, synchronization, covers and other licensed uses decades after its original release.

That durability was central to the catalog-investment thesis. A classic song is not guaranteed to earn the same amount every year, but decades of listening and licensing history provide something a newly released composition cannot: evidence of how audiences have returned to it across changing formats and generations.

What Sony Actually Acquired

The shorthand around catalog deals can become misleading quickly.

Sony Music Publishing acquired Recognition’s complete music-rights portfolio encompassing more than 45,000 songs. That does not mean every asset represents 100% ownership of an entire composition, nor should the song count be treated as 45,000 master recordings.

Recognition’s holdings were assembled through numerous transactions with different rights structures. Some purchases involved particular songwriter interests or shares of publishing income, while others included different combinations of rights.

That distinction becomes important when famous songs have multiple writers and multiple owners.

Music Week’s analysis noted that many Hipgnosis acquisitions involved individual writers’ shares. In some cases, Sony’s existing publishing interests and newly acquired Recognition interests can now sit within the same wider publishing operation.

Leonard Cohen provides a useful example. Sony already had a relationship with parts of Cohen’s publishing catalog, while Recognition held additional interests acquired through Hipgnosis. Bringing those rights into the same publishing company can simplify the administration of income streams that previously sat in separate portfolios.

Publishing itself is also distinct from ownership of a particular sound recording. A composition can generate revenue through many different recordings and uses, while the master is the copyright in a specific recorded performance.

The 45,000-plus figure therefore describes the enormous musical reach of the portfolio, not one identical ownership structure repeated 45,000 times.

GIC Keeps Institutional Capital at the Center

Moving the Recognition portfolio into Sony Music Publishing does not mean financial investors have left the story.

Sony Music Group and GIC launched their investment partnership to acquire and grow established music catalogs, combining Sony’s rights infrastructure with capital from Singapore’s sovereign wealth fund. Sony Bank Inc. also participated in the Recognition investment when the transaction was announced.

GIC invests Singapore’s foreign reserves across asset classes and markets around the world. Its presence in a multibillion-dollar music transaction demonstrates how thoroughly established songs have entered institutional investment portfolios.

That is a considerable evolution from the traditional publishing model centered primarily on signing songwriters, administering compositions and acquiring catalogs from other music companies.

For a financial investor, proven songs can offer recurring cash flows generated across streaming, performance, radio and licensing. For a publisher, outside capital provides greater purchasing power in a market where the most desirable catalogs can command billions.

The Sony-GIC venture combines those two sides of the equation: institutional capital and a global company already built to administer music rights.

Administration Becomes the Next Part of the Deal

Acquiring rights is only part of making a catalog perform financially over the long term.

A portfolio spanning approximately 150 catalogs has to be administered across streaming services, radio, television, film, live performance and collection systems operating in numerous territories. Ownership data needs to remain accurate, royalties must be collected and synchronization requests need to be handled when films, television shows, games or advertisers want to use a composition.

Recognition already operated as a music-rights investment and management company. The acquisition now moves its portfolio into Sony Music Publishing’s global administration and licensing network.

That shift is one of the most interesting parts of the transaction.

Hipgnosis helped popularize the idea that songs could be assembled into investment portfolios. Sony’s acquisition shows what can happen after a portfolio of that scale has been built: those interests can move into the infrastructure of a traditional global publisher capable of administering and licensing them across markets.

The strategy is already affecting Sony’s reported business. In its subsequent financial reporting, the company cited the consolidation of Recognition Music Group as one factor affecting its music results, MBW notes.

Owning valuable rights creates the asset. Collecting, licensing and administering those rights determines how effectively that asset works.

Recognition’s History Shows the Other Side of the Boom

The path from Hipgnosis to Recognition was not a simple upward line.

Hipgnosis Songs Fund became caught in disputes over governance, catalog valuations and its relationship with the investment adviser managing its portfolio after years of aggressive acquisition activity.

Blackstone ultimately acquired Hipgnosis Songs Fund from its public shareholders for $1.58 billion in July 2024. At the time, the portfolio carried an estimated enterprise value of approximately $2.2 billion.

Other Hipgnosis-related assets had been assembled separately. Blackstone spent more than $700 million on music through Hipgnosis Songs Capital beginning in 2021 before its holdings were eventually brought together under Recognition.

Sony had already begun acquiring pieces of that wider collection before the current deal. In February 2026, Blackstone sold another tranche of Recognition assets to Sony for more than $200 million, MBW reported. Sony Music Publishing had also acquired Hipgnosis Songs Group, formerly Big Deal Music, in 2025.

The corporate history complicates the simple idea that valuable songs automatically make an easy investment.

Copyrights can remain highly desirable while the structures holding them encounter questions involving debt, governance, valuation and investor expectations. Music catalogs may produce recurring revenue, but the price paid for those rights and the cost of financing them still matter.

Recognition’s latest transaction effectively moves one of the largest collections built during the catalog boom into a partnership between a major publisher and a sovereign wealth fund.

The Catalog Boom Is Entering Another Phase

Sony’s completed Recognition acquisition brings together two different forces that reshaped music publishing over the past decade.

Hipgnosis represented the period when investors raced to assemble portfolios and make the case that songs deserved to be treated as institutional financial assets. Sony Music Publishing represents the global infrastructure of rights administration, licensing and songwriter services.

GIC connects the two.

The result is not institutional finance retreating from music. A sovereign wealth fund remains directly involved in the acquisition, and the transaction was reportedly valued around $4 billion even though the companies did not disclose an official price.

What has changed is the scale and destination of the portfolio.

More than 45,000 songs across approximately 150 catalogs now sit inside a venture combining deep investment capital with one of the largest publishing networks in the business.

For Sony, that means more interests in compositions that have already demonstrated their ability to survive changing formats, markets and generations. For the wider catalog business, it shows how the buying boom is maturing.

The question is no longer simply who can raise enough money to buy famous songs.

It is increasingly about who has the capital, rights infrastructure and global reach to manage those songs for the decades that follow.

Hipgnosis helped make songs look like financial assets.

Now Sony and GIC have acquired one of the portfolios that helped prove the idea.