The Supreme Court’s decision in Cox Communications, Inc. v. Sony Music Entertainment, 146 S. Ct. 959 (2026), is important for copyright owners, but it should not be read too broadly.
The decision does not mean that online copyright enforcement is dead. It does not mean that creators, businesses, photographers, musicians, software owners, or other copyright holders have no remedies when their work is copied or distributed online.
Instead, Cox clarifies the limits of one theory of liability: when an internet service provider can be held responsible for infringement committed by its users.
What Happened in Cox?
Cox involved claims against Cox Communications, an internet service provider. Cox received more than 163,000 copyright infringement notices over a two-year period and used a graduated response system that included warnings, suspensions, and possible terminations. The copyright owners argued that Cox should be liable because it knew subscribers were infringing and continued providing internet service.
The Supreme Court rejected that broad theory. The Court emphasized that contributory liability cannot be based only on knowledge that some users are infringing and a failure to do more to stop them. Cox provided general internet access, a service capable of substantial lawful uses, and the Court found no evidence that Cox actively encouraged infringement or designed its service primarily to facilitate infringement.
What This Means for Copyright Holders
The key point is that Cox does not eliminate copyright claims. It narrows one path for holding a general internet access provider liable for subscriber infringement.
Copyright owners can still pursue direct infringers. They can still send takedown notices. They can still enforce licenses. They can still seek damages for unauthorized copying, distribution, public display, public performance, or other violations of their exclusive rights.
The bigger lesson is that claims against platforms, service providers, or other intermediaries need stronger facts. After Cox, a copyright holder should look for evidence such as:
- specific knowledge of particular infringing activity;
- repeated or detailed infringement notices;
- willful blindness;
- active encouragement of infringement;
- a service designed or tailored to facilitate infringement;
- platform conduct that materially supports the infringement.
The theory of liability needs to match the evidence.
The DMCA Still Matters
The Court also emphasized that the DMCA safe harbor provisions are defenses, not automatic sources of liability. A service provider’s failure to qualify for a safe harbor does not automatically prove infringement.
That means copyright owners should focus on building a clear factual record. Important evidence may include registrations, screenshots, URLs, timestamps, copies of infringing content, takedown notices, platform responses, and records showing whether the defendant had specific knowledge of the infringement.
Copyright Enforcement Is Not Dead
For copyright holders, the takeaway from Cox is not defeat. It is precision.
A copyright owner should ask: Who copied the work? Where did it appear? Was the work registered? What notices were sent? Did the defendant know about specific infringement? Did the defendant encourage or materially support it?
Those facts matter.
Cox v. Sony makes some secondary-liability claims harder, especially against general-purpose internet access providers. But copyright enforcement remains alive. Copyright owners still have meaningful tools to protect their work online — they just need the right strategy, the right evidence, and the right target.
