CC BY License: Attribution Rules, Scope, and How to Apply It

The CC BY license, formally the Creative Commons Attribution license, lets anyone copy, share, remix, and commercially sell your work on a single condition: they credit you as the creator. It is the most permissive of the six standard Creative Commons licenses, and the current version, CC BY 4.0 International, is written to work across jurisdictions worldwide.¹ Everything else about using or applying it flows from that one requirement.

What CC BY Lets People Do

The license grants two core freedoms. Anyone can copy and redistribute the material in any medium or format, for any purpose, including commercial use. Anyone can also adapt the work, meaning remix, transform, or build on it to create something new, again for any purpose including profit.¹ A business can take a CC BY photograph, crop it, add text, and drop it into a paid advertising campaign without paying royalties. That level of openness is what separates CC BY from more restrictive Creative Commons options.

Rights flow directly from the original licensor to every downstream user. Every person who receives a copy of the material automatically gets a direct offer from you, the creator, to use it under the same CC BY terms.² Permission doesn’t pass through a chain of sub-licenses. If someone shares your work with a colleague, that colleague’s permission comes straight from you.

The license also blocks anyone from adding extra restrictions. A redistributor cannot impose additional terms or apply digital rights management that would prevent recipients from exercising the freedoms the license grants.² DRM on a personal distribution copy is fine, but it cannot be used to lock the work down for others.

What Proper Attribution Requires

Attribution is the entire condition. Get it right and you can do nearly anything with the work. Get it wrong and you are infringing copyright, which exposes you to the same remedies available in any infringement case, including statutory damages between $750 and $30,000 per work, with higher ceilings for willful infringement.³ Photographers have built litigation practices around enforcing attribution on Creative Commons images, so this is not a theoretical risk.

When you share CC BY material, the legal code requires you to retain the creator’s name (or pseudonym or organization name) as they’ve asked it to appear, any copyright notice supplied with the work, a reference to the CC BY license, a reference to the disclaimer of warranties, and a link or URI to the original when reasonably possible. If you’ve modified the work, you must indicate that changes were made and preserve any record of previous modifications.²

The TASL Framework

Creative Commons recommends the acronym TASL as a shorthand for the key components of a good attribution notice:⁴

Title of the work, if one was provided. Under 4.0 this is recommended but not strictly required; under 3.0 and earlier it was mandatory.
Author, meaning the creator or copyright holder, named however they’ve specified.
Source, a URL or hyperlink pointing to the original so future users can find it.
License, the specific CC license that applies, ideally named and linked (for example, “CC BY 4.0” linked to the license deed).

There is no single mandatory format. The license requires attribution to be “reasonable” given the medium, means, and context.² A blog post can carry a full text credit under an image. A video can use an end-credits screen. A podcast can put the information in show notes. If you’ve made an adaptation, note that in the attribution so readers understand how your version relates to the original.⁴

One detail catches people off guard. If the licensor asks you to remove attribution information, you must comply to the extent reasonably practicable.² A creator might make that request if they don’t want their name attached to a particular derivative.

What Happens If You Break the License

Under older versions of Creative Commons licenses (3.0 and earlier), any violation triggered automatic and permanent termination of your rights. The only way back in was an express new grant from the licensor. A forgotten credit line could lose you all rights to the work with no built-in fix.⁵

Version 4.0 added a cure period. If your rights terminate because you violated the license, they automatically reinstate the moment you correct the violation, provided you do so within 30 days of discovering it.² You don’t need the licensor’s permission to get back into compliance. Outside that 30-day window, you need express reinstatement. Either way, the licensor can still pursue remedies for the period when you were in violation. The cure provision forgives going-forward use, not past infringement.

What CC BY Does Not Cover

CC BY is a copyright license. It does not grant patent or trademark rights.² If a work contains a patented process or a trademarked logo, CC BY does not give you permission to use those elements. You need separate authorization from the patent or trademark holder.

Moral rights get a specific carve-out. The license does not transfer moral rights like the right of integrity, and it does not cover publicity or privacy rights. The licensor waives or agrees not to assert those rights only to the limited extent necessary for you to exercise the freedoms the license grants.² In countries where moral rights are strong and non-waivable, that structure keeps the license functional without asking creators to surrender protections local law won’t let them give up.

Version 4.0 does explicitly cover sui generis database rights in jurisdictions that recognize them, such as most of Europe. If the licensed material is a database, CC BY 4.0 grants the right to extract, reuse, reproduce, and share all or a substantial portion of the contents, subject to the same attribution requirement.²

How CC BY Compares to the Other Creative Commons Licenses

Creative Commons offers six standard licenses built from combinations of four conditions. CC BY sits at the most permissive end because it asks only for attribution. Every other CC license adds at least one restriction on top:

CC BY-SA (ShareAlike): same broad reuse as CC BY, but any derivative must be released under the same or a compatible license. This is the “copyleft” approach.
CC BY-NC (NonCommercial): sharing and adapting with attribution, but noncommercial purposes only.
CC BY-ND (NoDerivatives): sharing the original with attribution, commercially or not, but no distribution of modified versions.
CC BY-NC-SA: combines noncommercial and share-alike. Derivatives allowed, but only noncommercial and only under the same license terms.
CC BY-NC-ND: the most restrictive CC license. Noncommercial sharing only, and no derivatives distributed at all.

CC BY vs. CC0

CC0 is not technically a license but a public domain dedication. Where CC BY keeps copyright in place and attaches an attribution condition, CC0 waives all copyright and related rights to the fullest extent the law allows.⁶ Under CC0, there is no legal requirement to credit the creator. Researchers and data publishers often choose CC0 for datasets because it removes legal ambiguity about reuse, especially where database rights or copyright applicability to data is uncertain.

The choice usually comes down to whether attribution matters to you. Want credit? Use CC BY. Want to strip out every possible barrier to reuse and don’t mind anonymous distribution? CC0 is the cleaner tool. Even under CC0, academic and scientific norms still expect citation; the legal requirement disappears, the professional expectation does not.⁶

Applying CC BY to Your Own Work

Before licensing anything, confirm you hold the rights to the entire work. If your project contains third-party material you don’t control, you can’t license those elements under CC BY without permission from their copyright holders. Where third-party content is embedded, mark clearly which portions are not covered. A general notice such as “Except where otherwise noted, this work is licensed under CC BY 4.0,” combined with specific labels on excluded elements, is the clearest approach.⁷

Decide how you want to be credited. You can specify your full name, a pseudonym, or an organization. That is the name users will include in their attribution, so choose deliberately. A permanent URL for the work helps keep a stable reference point as the content moves around the internet.

Using the License Chooser

The Creative Commons License Chooser at creativecommons.org/chooser generates standardized HTML code, icons, and license statements you can embed in a website or digital document.⁸ The tool walks you through selecting your license type and produces a code snippet that makes the license machine-readable, which helps platforms and search engines surface your work in filtered searches for reusable content.

For print, physical media, or offline formats, a text-based notice is fine. Put it somewhere conspicuous: the footer of a document, the credits page of a book, the description field of a video. State the license and link to its deed page. Creative Commons recommends including the full URL when a clickable hyperlink isn’t possible.⁸

The License Is Irrevocable

Once applied, CC BY cannot be revoked. You can stop distributing the work under CC BY at any point, but anyone who already has a copy may continue using it under the license terms for the full duration of the applicable copyright.⁹ This is the single most consequential thing to understand before applying the license. If you later regret the decision, your only option is to stop your own distribution. You cannot claw back the permissions already granted. Treat the choice as permanent.

1
Creative Commons. Attribution 4.0 International
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Creative Commons. Attribution 4.0 International – Legal Code
3
Ninth Circuit District & Bankruptcy Courts. 17.37 Copyright – Damages – Statutory Damages (17 U.S.C. 504(c))
4
Creative Commons. Recommended Practices for Attribution
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Creative Commons. 4.0/Termination
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Creative Commons. CC0 – Creative Commons
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Creative Commons Wiki. Marking Third Party Content
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Creative Commons. 4.1 Choosing and Applying a CC License
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Creative Commons. Frequently Asked Questions