What Is Copyleft?

Legally Reviewed
Fact-Checked

 What Is Copyleft?

Copyleft is a concept that provides that certain software and computer programs may be passed on to other users. These users can then be granted access to that software, program, or source code in order to:

  • Use it
  • Copy it
  • Reproduce it
  • Examine it
  • Modify it

These rights are provided under the agreement that any redistributed software of programs are also to be passed along to subsequent users including the same stipulation and distribution terms, or the same copyleft terms.

This allows users to access and use material which may otherwise be restricted because of copyright issues. The word copyleft is a play on words of the term copyright.

Copyleft implies that it is the opposite of a copyright. The laws which govern copyrights place limitations on individuals who do not own the copyright for software or for a program, therefore providing exclusive usage and distribution rights for the copyright holder.

A copyleft provision, in comparison, allows other individuals to use the program so long as they follow the distribution terms included in the agreement. This creates a chain per se of free usage for subsequent individuals.

How Does Copyleft Work?

Copyleft functions by first identifying what software or program is in question. Next, the owner of the copyright can make the program available but they will attach additional legal documents to that program.

These documents are known as copyleft provisions and outline how the program may be used and under what terms it may be distributed. It is important to note that copyleft documents or terms do not constitute an abandonment of copyright privileges but instead are a tailoring or the copyright which allow usage in a very specific manner.

In certain respects, copyleft provisions are similar to copyright licenses because they allow individuals or parties to use copyrighted material. Copyright licenses, however, often involve one-time usages while copyleft has more to do with the rights that are involved with the reusing and reproduction of programs.

Software was often made available for free in the past simply by submitting it into the public domain. The issue with this practice was that any individual can use that software and then alter it, therefore presenting a different program from what was originally intended.

Copyleft provisions are intended to preserve the program while still allowing it to be distributed.

What Are Some Legal Issues Associated with Copyleft?

As noted above, a copyleft provision is not an abandonment of copyright terms. Instead, it is a narrowing of the scope of those terms.

A violation of copyleft provisions may lead to legal disputes and issues, which may involve:

  • Confusion with a contract or disclosure agreement
  • Actual infringement upon the owner’s copyright privileges
  • Use of a C that is backwards and enclosed in a circle
    • The standard C that is enclosed in a circle must be used to denote that the program or software is, in fact, copyrighted
      • The backwards C does not have any legal effect
  • Failure to follow the copyleft distribution terms

The legal consequences for a dispute involving copyleft provisions may include an award of monetary damages for any lost profits which resulted from the violation. In addition, the failure to follow the copyleft distribution terms may effectively break the chain of the valid redistribution of the program, therefore, limiting access for future users to that program.

A violation will, of course, depend upon the individual copyleft terms as well as the laws of the state where the violation occurred.

What Is Copyright?

Copyrights are used to prevent other individuals from using an originally authored work. Copyright laws are similar to trademark laws that protect logos and brand names.

An item or work that is to be copyrighted should be an original and not a copy or reproduction of property which is already copyrighted. Pursuant to federal laws, copyright entitles the owner of the property to numerous exclusive rights, including:

  • The right to reproduce the copyrighted work
  • The right to distribute copies of the copyrighted work to the public for sale
  • The right to perform the copyrighted work
  • Rights to produce a license that are derived from other copyright materials
  • Licensing rights to manufacture and make a product

What Are the Different Types of Copyrighted Works?

There are endless examples of creative works that can be copyrighted. Some examples of creative works include:

  • Recorded or sheet music
  • Books and novels
  • Software codes, video games, and CD-ROMs
    • It is important to note that these works may not be protected if they have already been distributed through a copyleft agreement
  • Art, such as:
    • paintings
    • plays
    • dance choreography
    • sculptures

What Is Copyright Protection?

According to federal laws, an individual obtains a copyright to their work automatically once they have fixed their original work in a tangible medium of expression. An individual must have independently created the work and must not have adapted it from something else.

The individual’s work must also be placed in a sufficiently permanent medium such that other individuals may:

  • Reproduce it
  • View it
  • Communicate it

Copyright protections apply at the moment the author fixes their work in a tangible form without the author having to take any actions. Once a work obtains copyright protections, the creator or inventor determines who can use the work and for what purposes it may be utilized.

Once a work is protected, no other individual can use that work without the permission of its creator.

What Is Copyright Infringement?

Copyright infringement occurs when a party uses copyrighted material of another without the owner’s permission for financial gain. As previously noted, a copyright covers:

  • Artistic works
  • Literature
  • Performances

Because these types of materials involve a creative process, it may often occur that one individual’s work influences another individual’s artistic work. It is important to note, however, that a direct appropriation of protected material is against the law and may be punishable by consequences including:

  • Fines
  • Confiscation of the unauthorized material
  • Criminal consequences in some cases

Is Copyleft a Defense to Copyright Infringement?

Yes, copyleft may be used as a defense to copyright infringement. Computer programs and software which have been distributed in accordance with a copyleft agreement are not protected by any subsequent attempt to enforce a copyright.

When a copyleft agreement is enacted, the creation of that program which is being distributed through the copyleft agreement forfeits certain rights to that intellectual property.

What Is AI (Artificial Intelligence)?

Artificial intelligence is a branch of computer science that is often called AI. AI allows systems to perform complicated tasks that would usually require human intelligence, for example, decision-making, reasoning, learning, and recognizing patterns.

Artificial intelligence allows machines to automate tasks, process data, and improve performance. Artificial intelligence systems that use machine learning can use data to identify patterns and predict outcomes in addition to improving their accuracy over time.

What Are Some Legal Issues Involving AI?

There are many different legal issues that can arise related to AI, as AI can be involved in many different industries and practices, including copyrights. Examples of some of the different types of legal issues that can come up involving AI include:

  • Intellectual property ownership and copyright
    • Questions about whether AI-generated content can be copyrighted
  • Copyright infringement
    • Whether training AI models on copyrighted materials constitutes copyright infringement
  • Liability
    • Lack of clarity about which party is responsible for damages when an AI system malfunctions
    • Courts are making determinations regarding whether AI platforms are responsible for harmful outputs
    • Courts are making determinations if AI platforms owe a duty of care to users
  • Issues with output accuracy
    • AI systems may generate misleading or false information, which can pose a legal risks if users, especially for those in specialized fields rely on those outputs, such as medicine
  • Data privacy breaches
    • AI commonly uses data that is input by users for its training, which may violate privacy and confidentiality laws if the information is sensitive in nature
  • Deepfakes and Privacy Issues
    • AI can be used to create deepfakes as well as non-consensually created private or intimate content
  • Algorithmic bias and discrimination
    • If a bias is present in the input training data, the AI system may amplify or perpetuate the bias, which leads to discriminatory decisions

Some high-profile lawsuits have been filed against AI companies that involve issues including child safety, data scraping, and copyright infringement. More specific examples of the areas of law involved in lawsuits filed involving AI include issues related to image, video, and audio rights, using copyrighted images for creating new works and in training, and fraud and antitrust claims related to unfair competition.

Issues involving AI are evolving, both related to the law and the technology. It is important to note that there are and will likely continue to be new court rulings as well as guidelines that are provided in the future that will share its use.

Court Rulings

There have been recent federal court rulings regarding AI and the fair use doctrine. The fair use doctrine applies to copyright materials and when they can be used for some purposes, such as research, scholarship, comment, and criticism.

Whether training AI models using copyrighted data is currently under debate. If the result is a transformative use, or provides a different purpose changing the message, meaning, purpose, character, or expression, copyrighted material may be used.

United States Copyright Office

The Copyright Act of 1976 requires that works have human authorship, meaning that those created entirely by AI cannot be copyrighted. The U.S. Court of Appeals for the District of Columbia Circuit affirmed this requirement in 2025.

When a copyright creator does use AI to generate their content, they have to state they did so or their copyright registration may be cancelled.

What if I Have a Dispute Involving AI Issues?

When a dispute arises that involves AI issues, it is important to seek legal advice. One of the most helpful ways to avoid disputes that involve AI issues is to seek advice from an attorney before any issues arise to determine the steps to take to protect creative works, such as registering for a copyright and what protections that provides.

If an AI dispute does arise, a copyright attorney can help determine what party may be liable, which is often a developer or a user. An attorney can also review the facts of the case and determine the type of claim to file, such as copyright infringement, breach of contract, or fraud.

The laws that apply to AI will continue to be updated as technology evolves, so it is important to seek legal advice from a copyright attorney to determine the most current copyright requirements and laws. It is also important to be aware that both copyright and AI laws can be changed or updated when there are changes in presidential administrations.

How Can Current Legal Cases Impact the Use of AI and Copyrights?

Most likely, there will be new legal decisions in the coming years that will impact the use of AI and how it impacts the rights of copyright holders. Two recent impactful examples are discussed below.

Bartz v. Anthropic

The Northern District of California court held that the generative large language model (LLM) that Anthropic used for AI training was exceedingly transformative and qualified as fair use. However, because the company downloaded pirated works, it was still required to pay damages.

This is an impactful case because there are many other AI developers who have either admitted to or have been accused of using training materials from the same data sets and, therefore, may face the same consequences.

Kadrey v. Meta

This case involved the issue of whether Meta was involved in seeding, or uploaded copyright works while simultaneously using BitTorrent technology to download those works. Although a decision has not been reached, if the court determines that Meta did distribute large volumes of copyrighted works, it may be held liable for substantial damages.

This is a potentially impactful case, as it may provide a roadmap for copyright holders in the future on steps to win an AI infringement case.

Do I Need a Lawyer for Assistance with Copyleft Issues?

Copyleft agreements are considered relatively new. These agreements are specific to the software industry and may not apply to other copyrighted works, for example, literature or music.

You may find it helpful to consult with a copyright lawyer in your area if you have any questions, issues, or concerns that involve copyleft. Your attorney can advise you of the laws which apply to your issue.

If you are required to file a lawsuit and appear in court to resolve your issue, your attorney will represent you during those appearances. If you are seeking damages due to being financially harmed by a copyleft issue, your attorney can advise you regarding the possible compensation you may be able to receive.

If you have been accused of violating a copyleft provision, your attorney is best equipped to demonstrate to the court any defenses which may be available to you and fight to ensure you are not required to pay compensation you do not owe. Use the free attorney-client matching services LegalMatch provides to find a copyright attorney in your area.

It will only take you a short time to complete LegalMatch’s online submission process, where you can explain your question or concern and you will be matched with copyright attorneys in your area who will answer your question or address your concern.

Save Time and Money - Speak With a Lawyer Right Away

  • Buy one 30-minute consultation call or subscribe for unlimited calls
  • Subscription includes access to unlimited consultation calls at a reduced price
  • Receive quick expert feedback or review your DIY legal documents
  • Have peace of mind without a long wait or industry standard retainer
  • Get the right guidance - Schedule a call with a lawyer today!
Loading...