UMG vs. Anthropic

Marisa Shah
Jul 7
5 min read

The Music Industry vs. Claude: Inside the UMG-Anthropic Copyright Fight

When Universal Music Group first sued Anthropic in October 2023, it looked like one more skirmish in the AI copyright wars. Nearly three years later, it has grown into one of the most consequential and most tangled legal battles over how AI companies are allowed to build their models. Here's where things actually stand.

How It Started: 500 Songs and a Chatbot That Wouldn't Stop Quoting Them

In October 2023, Universal Music Publishing Group, Concord Music Group, and ABKCO filed suit against Anthropic in federal court in Tennessee, accusing the company's Claude chatbot of reproducing copyrighted lyrics on demand. The complaint pointed to specific examples: ask Claude for Katy Perry's "Roar" or Gloria Gaynor's "I Will Survive," and it would allegedly hand back the full lyrics. Ask it to write an original song about Buddy Holly's death, and it would supposedly lean heavily on Don McLean's "American Pie" instead.

The publishers covered roughly 500 songs by artists from Beyoncé to the Rolling Stones and sought statutory damages of up to $150,000 per work, putting potential liability around $75 million. The case was later transferred to the Northern District of California, where it landed before Judge Eumi K. Lee.

Round One: Guardrails, Not a Knockout

By January 2025, the two sides reached a partial truce. Anthropic agreed to keep the "guardrails" it had already built into Claude to block verbatim lyric reproduction, extend those safeguards to future models, and respond promptly if publishers flagged new violations. But this wasn't a settlement of the underlying claims, as it just resolved the publishers' request for a preliminary injunction, and the core lawsuit continued.

The publishers then pushed for something stronger: a full injunction barring Anthropic from using their lyrics to train future models. In March 2025, Judge Lee denied it, ruling the publishers hadn't shown the kind of "irreparable harm" needed and that they were essentially "asking the Court to define the contours of a licensing market for AI training where the threshold question of fair use remains unsettled". It was a win for Anthropic but a narrow, procedural one that left the fair-use question wide open.

Litigation over that original case kept grinding forward. In October 2025, the court denied Anthropic's motion to dismiss amended claims, finding the publishers had plausibly alleged Anthropic knowingly let Claude output copyrighted lyrics, profited from it, and used training methods that stripped copyright management information.

Round Two: A $3 Billion Piracy Allegation

Then came the escalation. On January 28, 2026, the same coalition, now joined more prominently by UMG, filed a second, separate lawsuit against Anthropic, this time alleging the company's founders had illegally downloaded millions of pirated files, including songbooks, via BitTorrent to train Claude. This suit covers more than 20,000 songs, seeks over $3 billion in statutory damages, and notably names Anthropic CEO Dario Amodei and co-founder Benjamin Mann personally. Publishers say they uncovered the piracy evidence while investigating the original case. The court has since permitted publishers to depose Amodei directly as part of discovery.

The Fair-Use Showdown That Keeps Getting Delayed

The central legal question in both cases is whether training an AI model on copyrighted lyrics counts as fair use, which is the same question looming over nearly every AI copyright case in the country. In March 2026, the publishers asked Judge Lee for partial summary judgment, arguing Claude's outputs are derivative works that "compete with and dilute the market" for the originals, and that a $380 billion AI company shouldn't get a pass for quintessential infringement. Anthropic countered in April with its own summary judgment motion, arguing its use of the lyrics alongside billions of other works is transformative and squarely fair use.

A hearing on that motion was originally set for July 15, 2026. But in late April, Judge Lee issued a 90-day stay across the related cases to sort out coordination issues between the original suit, the new $3 billion piracy case, and a related suit from BMG Rights Management pushing the summary judgment hearing to October 21, 2026. So as of this writing, the industry's long-awaited fair-use ruling is still months away.

The Precedent: Bartz v. Anthropic

While the music case has crawled forward, a parallel lawsuit from book authors has already produced the clearest signal yet of how courts might rule. In Bartz v. Anthropic, Judge William Alsup found in mid-2025 that training an AI on *legally acquired* books was fair use but that Anthropic's practice of downloading and permanently storing pirated books from sites like LibGen was not. Facing a trial over that piracy, Anthropic agreed to a $1.5 billion settlement, the largest copyright payout in AI history.

That settlement cleared its final fairness hearing on May 14, 2026, with a striking 92.77% claims rate among eligible rightsholders and payouts set at roughly $3,100 per work. Final approval is still technically pending, however as of June 2026, the judge had not yet ruled on how to handle a handful of late opt-out requests, so checks haven't gone out yet. [

The split ruling in Bartz, that training can be fair use, but piracy isn't a shortcut to get the training data, is widely expected to shape how Judge Lee approaches the music publishers' case when it finally gets its day in court.

Why This Case Matters Beyond Music

UMG, Concord, and ABKCO aren't just fighting for lyric royalties. They're trying to establish a legal boundary that would apply across the entire AI industry: that scraping copyrighted creative works like songs, books, and images to train commercial AI models is not automatically excused as transformative fair use, especially when the source material was obtained through piracy. Anthropic, meanwhile, is defending the foundational premise that its models are learning from data the way a person might, and that this counts as legally distinct from redistributing the material itself.

With the summary judgment hearing pushed to October 2026, discovery into Anthropic's internal practices ongoing, and the Bartz settlement still working through final approval, the case remains very much unresolved. What is resolved is the scale of what's at stake: two lawsuits from the same coalition, over 20,000 songs, and a combined exposure north of $3 billion, making this one of the largest copyright fights the AI industry has faced.

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