Copyrightable vs C2PA Content Credentials

If you've started caring about AI provenance, you've probably bumped into both Content Credentials and a question like "doesn't this already prove I made it?" Short version: C2PA and Copyrightable answer two different questions, and confusing them will leave you exposed on the one that matters in a copyright dispute.

They're not competitors. They're closer to complements. But to use them well you have to see exactly where each one stops.

What C2PA actually does

C2PA, the standard behind Adobe's Content Credentials, is a provenance system. It attaches cryptographically signed metadata to a piece of content describing how that asset came to exist: which device or app created or edited it, what tools touched it, whether AI was involved, and a tamper-evident chain of those edits.

That's genuinely valuable, and it's well-designed. When a news photo carries Content Credentials, a viewer can check that the image came from a particular camera, see what edits were applied, and detect whether the file was altered after signing. It fights deepfakes and misinformation. It tells you the history of the bits.

Be fair to what it's for. C2PA answers "where did this asset come from and has it been tampered with." It's a chain of custody for digital content. For its purpose, provenance and integrity, it's strong, open, and increasingly adopted across cameras, editors, and AI generators.

What C2PA doesn't claim to do

Here's the part people slide past. C2PA records that AI was used and which tools were involved. It does not, and doesn't try to, establish that a human authored the expressive elements of the work in the way copyright requires.

Walk through it. A Content Credential might faithfully record: "generated with Midjourney, edited in Photoshop." Accurate. Tamper-evident. And from a copyright standpoint, it actually highlights your problem rather than solving it, because it documents that a machine generated the image. It says nothing about whether you selected among outputs, arranged them into something new, or modified the expression in ways that count as human authorship. Provenance is not authorship strength. A perfect chain of custody on a purely AI-generated asset still describes an asset no one can copyright.

So if you took a C2PA manifest into a copyright fight as your authorship evidence, opposing counsel would thank you. It confirms the AI involvement and stays silent on the human creative control that determines whether you own anything. Right tool, wrong question.

To be clear, this isn't a knock on C2PA. The standard was designed for a media-integrity world, where the urgent problem is knowing whether a viral image is real and what touched it. The authors of the spec never set out to adjudicate copyright, and they'd tell you the same. Asking C2PA to prove human authorship is like asking a shipping manifest to prove you designed the cargo. The manifest is honest and useful. It's just answering a different question than the one a copyright examiner asks.

What copyright actually requires

This is the question Copyrightable is built around, so it's worth restating the legal target precisely.

Copyright protects works of human authorship. A machine can't be an author, which the Copyright Office's 2025 guidance and the court in Thaler v. Perlmutter both made plain, leaving purely AI-generated output unprotectable. For protection, a human must control the expressive elements, and the Office names three forms that control takes: selection, arrangement, and modification.

Prompts alone don't qualify, regardless of length, because describing a result isn't authoring the specific expression the model produces. And there's no magic threshold, no percentage, no edit count. It's a case-by-case judgment about what a human actually controlled. Zarya of the Dawn is the worked example: the human's selection, arrangement, and written text earned protection while the raw Midjourney images were disclaimed. The copyright question is qualitative and it's about human creative decisions, not file history.

Notice that none of that is what C2PA measures. C2PA logs tools and edits. Copyright cares about human expressive control. Same content, different axis.

What Copyrightable does

Copyrightable captures the human creative process and ties it to a Work as evidence of authorship. Where C2PA records what tools touched the file, Copyrightable records what creative decisions the human made: the outputs you selected and rejected, how you arranged elements, what you modified and why. The selection, arrangement, and modification the Copyright Office actually looks for.

It scores that record against a published Authorship Methodology, currently v0.1, which measures the kind of creative control you exercised. Deliberately, it never produces a percentage or claims that some quantity of human input crosses a legal line, because the Office doesn't work that way and a tidy number wouldn't survive a real examiner. Copyrightable is evidence, not legal advice. It won't make machine output protectable, and it doesn't pretend to. What it produces is a record aimed squarely at the human-authorship question, the one that decides ownership.

Side by side

Put them in one frame.

C2PA / Content Credentials. Question answered: where did this asset come from, and has it been altered. Mechanism: signed, tamper-evident provenance metadata about devices, tools, and edits. Strength: chain of custody, integrity, disclosure of AI involvement. What it isn't: proof of human authorship for copyright.

Copyrightable. Question answered: did a human author the expressive elements, and can you prove it. Mechanism: a captured record of creative decisions (selection, arrangement, modification) tied to the Work, scored against a published methodology. Strength: evidence aimed at the legal standard for authorship. What it isn't: a tamper-proof history of the file's bits, and not legal advice.

One documents the asset's journey. The other documents the human's creative contribution. Different questions, different evidence.

Why you probably want both

These two genuinely fit together, and pretending otherwise would be a disservice.

Imagine a real dispute or a registration. C2PA tells the story of how the file was produced and proves it hasn't been tampered with since. Copyrightable tells the story of what you, the human, creatively decided, and ties it to the standard the Copyright Office uses. Provenance plus authorship. Integrity of the artifact plus evidence of the human behind it. One without the other leaves a gap: provenance with no authorship record can't establish ownership, and an authorship record with no provenance is easier to challenge on whether the underlying asset is even what you say it is.

There's also the disclosure angle, where they reinforce each other. If you register an AI-assisted work, the Office requires you to disclose the AI use and disclaim what you didn't author. C2PA naturally documents the AI involvement; Copyrightable documents the human authorship you're claiming. Honest disclosure on one side, defensible claim on the other.

So the framing isn't C2PA or Copyrightable. It's provenance and authorship. If you're producing AI-assisted work that matters, lean on Content Credentials for the chain of custody and use Copyrightable to capture the human creative control that copyright actually turns on. Different jobs. You want both done.