Cox v. Sony Music: You Are Not the Copyright Police
Somebody pirates a song.
Who do you sue?
The pirate?
Too easy.
How about the company that provides his Internet connection?
Now we have a billion-dollar copyright case.
For years, Sony Music and dozens of other record companies fought Cox Communications over piracy committed by Cox subscribers.
The labels argued that Cox knew repeat infringers were using its network, received enormous numbers of infringement notices, and nevertheless continued selling those customers Internet access.
A jury eventually delivered a spectacular answer:
$1 billion.
Then the case reached the Supreme Court of the United States.
On March 25, 2026, all nine justices agreed on something considerably less spectacular but far more important:
Providing ordinary Internet access to people you know may be infringing copyright does not, by itself, make you a contributory copyright infringer.
The billion-dollar theory collapsed.
And behind the decision sits a question much larger than music piracy:
Who gets to decide when somebody should be thrown off the Internet?
A Billion-Dollar Internet Connection
More than 50 music companies sued Cox in 2018.
The plaintiffs included major copyright owners associated with Sony, Universal and Warner.
Their accusation was not that Cox itself was sitting in an office downloading pirated albums.
Cox's subscribers were doing the downloading.
The labels argued that Cox knew about repeated infringement through copyright notices and failed to terminate enough of the offending accounts.
In 2019, a jury found Cox liable for contributory and vicarious copyright infringement involving more than 10,000 copyrighted works.
The price tag:
$1 billion.
That number should make any Internet provider suddenly become very interested in what its customers are downloading.
The Copyright Police Problem
At first glance, the labels' argument has an appealing simplicity.
You know Customer X repeatedly pirates music.
You control Customer X's Internet connection.
You keep supplying that connection.
Therefore you are helping Customer X pirate music.
Disconnect him.
Problem solved.
Except Internet access is not a BitTorrent application.
It is not a pirate server.
It is not a bootleg music marketplace.
It is general-purpose infrastructure used for practically everything modern humans do.
Work.
School.
Banking.
Government services.
Medicine.
Communication.
Shopping.
Entertainment.
And, yes, occasionally copyright infringement.
So the legal question becomes uncomfortable very quickly.
If somebody uses a general-purpose service illegally, when does the company supplying that service become legally responsible for what the customer does?
The Supreme Court Drew a Line
The Supreme Court's answer was remarkably clear.
A company does not become liable for contributory copyright infringement merely because it provides a general-purpose service while knowing that some customers use that service to infringe.
Justice Clarence Thomas wrote the unanimous opinion.
The key issue was intent.
Under the Court's precedents, contributory liability requires more than passive knowledge that infringement is occurring.
The defendant must intentionally induce or encourage infringement.
Cox provided Internet access.
But the Court found that Cox did not intend for its Internet service to be used for copyright infringement.
It did not design its broadband service specifically for piracy.
It did not advertise:
“Unlimited Internet — now with easier copyright theft!”
It sold ordinary Internet connections.
That mattered.
Knowing Is Not the Same as Encouraging
This distinction sounds simple.
Legally, it is enormous.
Sony's theory effectively treated Cox's continued provision of service as enough to establish culpable participation.
The Supreme Court rejected that leap.
Knowing that somebody is doing something illegal through your service is not necessarily the same as wanting them to do it.
Nor is refusing to terminate the service automatically encouragement.
That principle extends far beyond Cox.
Cloud providers know some customers misuse servers.
Payment companies know some customers commit fraud.
Telephone companies know some subscribers use phones for crimes.
Shipping companies know illegal goods occasionally move through their networks.
Web hosts know some customers publish infringing material.
General-purpose infrastructure inevitably acquires bad users.
If knowledge alone created secondary copyright liability, enormous parts of the modern economy could become legally radioactive.
But Cox Wasn't Exactly an Innocent Bystander
This is where the story becomes more interesting.
The record companies did not invent their complaints out of thin air.
They accused Cox of receiving huge numbers of infringement notices and failing to take meaningful action against repeat offenders.
The case therefore wasn't really about whether piracy existed.
It did.
Nor was it about whether Cox knew infringement occurred on its network.
The crucial question was what Cox's knowledge and continued service legally meant.
The labels wanted that conduct translated into:
intentional participation in copyright infringement.
The Supreme Court refused.
That is an important distinction.
The ruling does not create a constitutional right to pirate music through your broadband connection.
It does not abolish copyright enforcement.
It does not say ISPs can actively encourage piracy.
It says something narrower:
An ISP does not become a copyright infringer merely because it continues providing ordinary Internet service to customers it knows are infringing.
Who Is Behind the IP Address?
Then comes the practical nightmare.
Copyright enforcement systems often identify infringement through IP addresses.
But an Internet account is not necessarily a person.
One connection may serve:
a family,
a roommate,
a guest,
an apartment,
a business,
a school,
a hospital,
a library,
a hotel,
or hundreds of people behind a shared network.
Suppose one person repeatedly downloads copyrighted music.
Who loses Internet access?
The infringer?
The account holder?
His wife?
His children?
His employees?
His customers?
Everybody?
Suddenly “terminate the pirate” is not such a clean instruction.
Internet access has become infrastructure.
Disconnecting it is considerably more serious than canceling somebody's account on a music-sharing website.
Copyright Notices Are Not Court Judgments
There is another uncomfortable issue.
A copyright infringement notice is an allegation.
It is not necessarily a judicial finding.
Automated enforcement systems can make mistakes.
IP addresses can be misidentified.
Accounts can be shared.
Wi-Fi can be abused.
Claims can be disputed.
Yet if ISPs face billion-dollar liability for failing to disconnect subscribers quickly enough, they receive a powerful economic incentive.
When in doubt:
Pull the plug.
Why investigate?
Why argue?
Why risk $1 billion?
That is where private copyright enforcement can quietly turn into private punishment.
A rights holder sends an accusation.
A corporation evaluates its liability.
A household loses Internet access.
No judge required.
Sony Wanted Enforcement. Cox Saw a Guillotine.
From the music industry's perspective, the problem is equally real.
Piracy at industrial scale is difficult to fight one downloader at a time.
Copyright owners need intermediaries to cooperate.
If an ISP knows that the same subscribers repeatedly infringe and simply keeps collecting their monthly payments, rights holders reasonably ask what deterrent remains.
The recording industry was therefore deeply disappointed by the Supreme Court's ruling.
Its argument is essentially that effective copyright protection requires meaningful consequences for intermediaries that knowingly tolerate persistent infringement.
That concern does not disappear because Cox won.
But the Supreme Court decided that secondary liability cannot be stretched merely because direct enforcement is inconvenient.
The Internet Is Not Napster
There is a fundamental difference between a service built around infringement and a service that can be used for infringement.
That distinction runs through decades of technology copyright cases.
A piracy platform whose business model depends on unauthorized music is one thing.
A broadband connection is another.
Cox's network could download a pirated album.
It could also download a tax return.
The technology itself was not tailored to infringement.
That was central to the Court's reasoning.
Cox did not provide a specialized piracy machine.
It provided the Internet.
And the Internet has substantial lawful uses on a scale almost impossible to exaggerate.
Nine Justices Said No
Perhaps the most striking part of Cox v. Sony is the vote.
9–0.
In an era when the U.S. Supreme Court divides bitterly over major questions, every justice agreed on the result.
Cox had neither induced its subscribers' infringement nor supplied a service designed around infringement.
Therefore it was not contributorily liable for Sony's copyrights on the theory presented.
The Court reversed.
The billion-dollar-plus copyright battle was over.
And the decision immediately mattered beyond Cox: in April 2026 the Supreme Court vacated another ISP copyright judgment involving Grande Communications and sent it back for reconsideration in light of Cox.
This was not merely one cable company's lucky afternoon.
The rules had moved.
Copyright Enforcement Has a Boundary
Copyright owners absolutely have the right to protect their works.
Pirates can be sued.
Services designed to promote infringement can face liability.
Companies that intentionally encourage infringement do not receive immunity merely because technology sits between them and the illegal act.
But copyright law has limits.
One of those limits now has nine Supreme Court signatures underneath it.
A company selling an ordinary service does not automatically become responsible for every illegal thing customers knowingly do with that service.
Otherwise every infrastructure provider becomes an enforcement agency.
And every copyright complaint becomes a demand:
Punish your customer or we may punish you.
The Supreme Court refused to make that the law.
The Pirate Has an ISP. That Doesn't Make the ISP a Pirate.
For the music industry, Cox was about protecting thousands of copyrighted songs.
For Cox, it was about whether selling broadband could turn an ISP into a billion-dollar copyright defendant because of what subscribers did with the connection.
For everybody else, the case asks a simpler question.
If somebody commits copyright infringement using a tool that millions of innocent people use every day, how far up the chain should liability travel?
From pirate to website?
From website to hosting company?
From hosting company to ISP?
From ISP to backbone provider?
Eventually copyright enforcement stops following the infringer and starts following the infrastructure.
The Supreme Court drew a line.
Sony can pursue pirates.
Copyright owners can protect their music.
And companies that intentionally foster infringement can still be held responsible.
But merely knowing that some customers misuse an ordinary Internet connection is not enough.
Because providing the Internet does not automatically make you responsible for everything that happens on it.
And an Internet provider is not automatically the copyright police.
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