Can you copyright AI-generated content? The human authorship test

Can you copyright something you made with AI? Sometimes, and only in part. In the United States, copyright protects human authorship. The Copyright Office will register the parts of a work a person created, chose and arranged, or changed in a creative way. It will not register material an AI system produced on its own, even if you wrote a long and careful prompt.

This page explains that test and the decisions behind it. It is part of our section on AI and copyright, which covers ownership, training, disclosure and proof of authorship. If you are about to register or publish, it ends with a short checklist.

01The human authorship rule

The Copyright Act protects "original works of authorship." It never defines "author," but the Copyright Office has required a human author for decades. Its Compendium of practices said so in 1973, in 1984 and again in the current edition.

The courts agree. In Thaler v. Perlmutter, decided March 18, 2025, the D.C. Circuit held that "the Copyright Act of 1976 requires all eligible work to be authored in the first instance by a human being." Stephen Thaler had listed his AI system, the "Creativity Machine," as the sole author of an image. The court affirmed the refusal. The Supreme Court denied Thaler's petition on March 2, 2026, so that ruling stands.

The same opinion made a point that matters for most readers. The court wrote that the rule "does not prohibit copyrighting work that was made by or with the assistance of artificial intelligence." It requires only that the author be a person. The hard question is how much a person has to contribute.

02What the Copyright Office will register

The Office answered that question for registrations in its March 16, 2023 guidance, published in the Federal Register. The test is whether the work is "basically one of human authorship, with the computer merely being an assisting instrument," or whether the traditional elements of authorship were "conceived and executed" by a machine.

In practice, that means:

• Protected: text you wrote, images you drew, music you composed, and your creative edits to AI material.
• Protected: your creative selection and arrangement of AI material within a larger work, such as a book that combines your text with AI images.
• Not protected: the AI-generated material itself, when the system decided how the work looks or reads.
• Not affected: ordinary tools. The guidance says a visual artist who edits an image in Photoshop is still its author, though AI-powered features inside such tools get the same analysis as any other AI.

Our summary of everything the Copyright Office has published on AI walks through the guidance and the later reports in date order.

03Prompts are not enough, so far

Most people want to know whether a detailed prompt makes them the author. The Office's answer, so far, is no. In the March 2023 guidance it compared prompts to "instructions to a commissioned artist": they say what you want, but the system decides how to carry it out.

The Office repeated the point in Part 2 of its report, Copyrightability, published January 29, 2025: "Based on the functioning of current generally available technology, prompts do not alone provide sufficient control." The phrase "current generally available technology" matters. The Office said it will keep watching, and that tools giving users more control over expressive details could lead to a different answer.

Effort alone does not change the result. Jason Allen told the Office he entered "at least 624" prompts and revisions to create his Midjourney image, Théâtre D'opéra Spatial. On September 5, 2023, the Office's Review Board still found the Midjourney-generated image was not the product of human authorship. A prompt may itself be creative enough to protect as text, but that does not make the generated output yours.

04Edited, selected and arranged AI output

This is where most real projects land. The Office's January 29, 2025 report lists three ways a human contribution can be protected even when AI was involved:

1. Your own work is perceptible in the output. If you feed in your drawing or your text and it shows up in the result, your authorship in it remains yours.
2. Creative selection, coordination or arrangement. Choosing and ordering AI images alongside your story, as in a graphic novel, can be authorship.
3. Creative modifications. Repainting, rewriting or reworking AI output can be protected, if the changes are themselves creative enough.

The limit is that the protection covers only your contribution. In the Zarya of the Dawn decision of February 21, 2023, the Office found that small changes to a character's lips were "too minor and imperceptible" to count. Our page on what happened to the Zarya of the Dawn registration shows where the Office drew that line. A book you wrote and edited with AI help can be registered. A picture that came straight from a prompt usually cannot.

05Cases at a glance

These are the decisions that define the rule today. Office decisions are from the Copyright Office's own records; court entries are from the court opinions and dockets.

One detail from the SURYAST decision of December 11, 2023 is worth knowing: the Review Board noted that in 2023 the Office had granted about 100 registrations for works containing AI-generated material, with that material disclaimed. Refusals make the news, but registrations with a disclaimer are common.

06Outside the United States

This page covers US law. Other countries decide for themselves, and the Copyright Office's January 29, 2025 report surveyed several of them:

• South Korea: 2023 government guidance says only a natural person can be an author, and only the human-changed parts of AI output are protected.
• China: in a November 27, 2023 judgment, the Beijing Internet Court found an image made with Stable Diffusion protected, citing the user's more than 150 prompts and later adjustments. The report notes the ruling is not binding precedent there.
• European Union: most member states, answering a 2024 Council questionnaire, said AI content can be protected only where human input was significant.
• United Kingdom: an older statute protects "computer-generated" works with no human author, naming the person who made the arrangements as the author.

If you publish or sell abroad, the rules where you sell may differ from the US rule. Talk to a lawyer licensed in that country if the stakes are real.

07What to do before you publish

1. Know which parts are yours. List what you wrote, drew, chose, arranged or reworked, and what the tool produced.
2. Keep your records. Save drafts, prompts, layered files and version history. They show your contribution if anyone asks.
3. Disclose on the application. If you register, describe your part and exclude AI material that is more than trivial. Our guide to filling in the AI disclosure on a registration shows the fields.
4. Read the tool's terms. They decide who may use the output under contract, which is a separate question from copyright. See who owns AI output, by contract and by law.
5. Get advice when money is on the line. If a book deal, a client contract or a lawsuit depends on the answer, talk to a lawyer licensed where you live.