Lawyer I Trust Guide · General U.S. information · Reviewed September 16, 2026
Copyright is a form of intellectual property protection granted under U.S. law to the authors of “original works of authorship.” This protection covers a wide range of creative expressions, including literary, musical, dramatic, choreographic, pictorial, graphic, sculptural, and audiovisual works, as well as sound recordings and architectural designs. The primary purpose of copyright is to provide creators with the exclusive legal right to reproduce, publish, sell, or distribute their work, thereby incentivizing the creation of new intellectual and artistic content.
Understanding Originality and Fixation
To qualify for copyright protection, a work must meet two fundamental requirements: it must be original and it must be “fixed in a tangible medium of expression.” Originality does not require the work to be novel or unique in a patent sense; rather, it must exhibit at least a minimal degree of creativity. The Supreme Court has clarified that simple facts or raw data, such as an alphabetical list of names, do not possess the requisite creativity for copyright protection. However, the specific arrangement, selection, or presentation of that data may be protected.
The requirement of fixation means that the work must be embodied in a medium—such as paper, a digital file, a canvas, or a recording—that is sufficiently permanent or stable to permit it to be perceived, reproduced, or otherwise communicated for a period of more than transitory duration. Copyright protection attaches to a work the moment it is created and fixed in this tangible form; it does not require formal registration to exist, although registration with the U.S. Copyright Office provides significant procedural advantages for enforcement.
The Scope of Protection
Copyright protects the expression of an idea, not the idea itself. This is a critical distinction in intellectual property law. For example, while an author can copyright a specific novel about a detective, they cannot copyright the general concept of a detective story. Others are free to write their own stories about detectives, provided they do not copy the specific, original expression found in the first author’s work.
Furthermore, copyright protection is not absolute. It is subject to various limitations, the most prominent being the doctrine of “fair use.” Under Section 107 of the Copyright Act, certain uses of copyrighted material—such as for criticism, comment, news reporting, teaching, scholarship, or research—may not constitute infringement. Courts determine fair use by weighing several factors, including the purpose and character of the use (such as whether it is commercial or for non-profit educational purposes), the nature of the copyrighted work, the amount and substantiality of the portion used, and the effect of the use upon the potential market for or value of the copyrighted work.
Public Domain and Government Works
Works that are not protected by copyright, or for which the copyright term has expired, are considered to be in the “public domain” and may be used freely by the public. It is important to note that works created by the U.S. federal government are generally not subject to copyright protection in the United States. However, this rule does not apply to works created by state or local governments, which may be protected by copyright. When using materials from government websites or agencies, it is essential to verify the specific status of the content, as some agencies may use materials under licenses that require attribution or have other specific usage restrictions.
Sources and further reading
- 17 U.S. Code § 102 – Subject matter of copyright: In general
- Cornell Law School: Copyright (Wex Legal Dictionary)
- USAGov: Copyright and federal government materials
- 17 U.S. Code § 107 – Limitations on exclusive rights: Fair use
Educational information only. This guide is not legal advice. Laws and procedures vary by jurisdiction.