Human Authorship: How Much of Your Work Must Be Yours to

You opened an AI tool, typed something, and got a result. But you didn’t stop there. You regenerated, cropped, painted over the parts you hated, rewrote the caption, dropped it into a layout you built by hand. Real choices. Real effort. So here’s the question that keeps creators up at night: how much of a piece has to actually come from you before the law calls it yours?

Is it 50%? A “substantial” amount? Enough that a stranger could tell you were involved? The honest answer is that copyright doesn’t measure your contribution with a ruler at all. It asks a different question — and once you understand what that question really is, protecting your work gets a lot less mysterious.

A canvas where only the human-painted half glows gold while the machine-made half stays dim, symbolising that only the human-authored part is protected — The line runs through the middle of the work: the human-made part is yours, the rest may not be.

The one rule hiding behind every AI-copyright headline

US copyright protection turns on two requirements, and almost every confusing story you’ve read is really about one of them.

Track the cases yourself

Every current AI-copyright ruling — and the ones still being fought — lives in our AI Copyright Ruling Tracker. Filter by your creator type to see, in plain language, how each case affects your rights.

The first is human authorship. Copyright has protected “the fruits of intellectual labor” that are “founded in the creative powers of the mind” since the 1800s — the Supreme Court said as much about a photograph back in Burrow-Giles Lithographic Co. v. Sarony (1884), and a federal appeals court reaffirmed it for AI in Thaler v. Perlmutter in 2025. No human author, no copyright. A machine can’t be the author, full stop.

The second is originality, and here’s the part that surprises people: the bar is genuinely low. In Feist Publications v. Rural Telephone (1991), the Supreme Court said a work needs only a “modicum” of creativity — “some minimal degree” — and that “the vast majority of works make the grade quite easily.” What it can’t be is purely mechanical or dictated by function (which is why an alphabetical phone book failed).

Put those together and the real test emerges. It’s not “how much did you make?” It’s “did a human make a creative choice about the expression, and is that choice more than trivial?” Quantity is a red herring. Creative control is the whole game.

“How much is enough?” is the wrong measurement

Because the standard is about control rather than volume, trying to hit a percentage will only mislead you. A single, thoughtfully composed human photograph is fully protected. A thousand AI images you generated by mashing the button a thousand times may give you nothing to own — not because a thousand isn’t a lot, but because you never controlled how any single one actually looked.

That distinction is the heart of the US Copyright Office’s January 2025 report, Copyright and Artificial Intelligence, Part 2: Copyrightability. Its conclusion, in plain terms: a prompt alone doesn’t make an AI image yours. No matter how long, detailed, or clever your prompt, you’re describing what you want and handing the actual creative execution — the specific pixels, brushstrokes, and composition — to the model. You’re the client, not the artist. And the Office was explicit that adding more prompts, or more detailed ones, doesn’t change that; you’re still not the one determining the expressive output.

That sounds discouraging until you notice what it’s really saying. The problem isn’t that you used AI. The problem is relying on the prompt alone. The moment you exert genuine creative control in ways the model doesn’t decide for you, the analysis flips in your favor.

A gold balance scale where a small creative spark tips past a threshold line, symbolising the minimal creativity needed for copyright — The originality bar is low — but a human spark still has to cross it.

What actually counts as your authorship

The 2025 report and the Office’s earlier guidance point to several kinds of human contribution that do earn copyright — even when AI is in the mix. These are the parts worth protecting:

Selection, coordination, and arrangement. If you generate a pile of outputs and then creatively choose and arrange them — the order of panels in a comic, the sequence of images in a book, the layout of a page — that selection and arrangement is its own protectable work. It’s called compilation authorship (17 U.S.C. §§ 101, 103), and it’s yours even if the individual pieces aren’t.
Creative modification of the output. Take an AI image and substantially rework it — repaint sections, restructure the composition, combine it with your own drawing, edit it into something meaningfully different. The creative changes you make are human authorship layered on top.
Human-authored elements woven in. The text you wrote, the melody you composed, the photo you shot, the code you authored — those don’t lose protection just because they sit next to AI-generated material. They’re protected on their own terms.
Expressive control beyond the prompt. Tools are evolving. Using inpainting to dictate specific regions, feeding your own sketch as a controlling input, arranging elements on a canvas by hand — the more the final expression is shaped by choices you make directly rather than the model’s guesswork, the stronger your claim.

Notice the theme: none of these is about how much of the work is human. Each is about a human making real, non-trivial decisions about the expression. That’s what the law rewards.

What doesn’t count (so you stop counting it)

Just as useful is knowing what won’t help you, no matter how much effort it felt like:

Prompt volume. Writing paragraphs of prompt, or iterating fifty times, is labor — but it’s instruction, not authorship of the output.
Cherry-picking a single output with no further creativity. Just picking the one you like best, on its own, generally isn’t enough to make that image yours.
Effort and time. Copyright has never rewarded “sweat of the brow” — that was the exact argument Feist rejected. Hours spent don’t create rights; creative choices do.
Owning the account or paying for the tool. Buying a Midjourney subscription makes you a customer, not an author.

If your whole contribution lives in one of these buckets, the fix isn’t to argue harder — it’s to add genuine creative control on top.

A hand arranging scattered gold tiles into an ordered glowing grid, symbolising copyright in the selection and arrangement of AI outputs — You may not own each generated tile — but the way you choose and arrange them can be yours.

The real-world line: ‘Zarya of the Dawn’

This isn’t theoretical. In February 2023 the Copyright Office ruled on Zarya of the Dawn, a comic book by artist Kristina Kashtanova that used Midjourney to generate its images. The decision is the clearest map we have of exactly where the line falls.

The Office kept copyright protection for two things: the text Kashtanova wrote, and the selection and arrangement of the images and words into a comic — her creative compilation. But it refused protection for the individual Midjourney images themselves, because their specific appearance came from the model, not from her.

One comic, two different answers, drawn along a single seam: the parts where a human controlled the expression were protected; the parts the machine generated were not. That’s the human authorship threshold in the wild — not a percentage, but a line that runs through the work, separating the pieces you steered from the pieces you merely requested.

A five-minute self-audit to protect the parts that count

You don’t need a lawyer to do the groundwork. Before you publish or register anything AI-assisted, run this quick check:

A gold checklist with glowing check marks beside a creator holding a brush, symbolising a self-audit to document human contribution — A few minutes of documentation now can protect the human parts later.

Name your human parts. Write down exactly what you contributed: the text, the arrangement, the edits, the composition. If you can’t name a specific creative choice, that’s a signal to add one.
Keep the receipts. Save your drafts, layered files, sketches, and edit history. If protection is ever questioned, contemporaneous records of your creative decisions are gold.
Increase your control where it’s thin. If a piece rests on prompts alone, do more to the output — rework it, arrange it, combine it with original work — so there’s real human expression to point to.
Register the human parts, and disclaim the AI parts. When you register, the Office asks you to identify AI-generated material and claim only the human-authored contributions. That’s not a loophole; it’s the honest, correct way to protect what’s genuinely yours (and misrepresenting it can invalidate a registration).
Stop overvaluing effort. Time spent prompting isn’t a rights argument. Redirect that energy into one clear creative choice you controlled.

The reassuring bottom line: you almost never need most of a work to be human. You need the human part to be a real, non-trivial creative choice — and you need to protect and document that part deliberately. Do that, and “I used AI” stops being a threat to your copyright and becomes just one tool among many in a piece that’s still, unmistakably, authored by you.

This article is general information for creators and small businesses, not legal advice. Copyright questions turn on the specific facts of your work, and the rules around AI are still developing — for a registration or dispute that matters, check the current Copyright Office guidance or talk to an IP attorney.

IPSurge helps creators and small businesses understand and protect their intellectual property — the ideas, names, and work that make them unique.

Sources & further reading:

Human Authorship: How Much of Your Work Must Be Yours to Copyright It?