What it covers, and what it leaves open
Copyright protects original expression once it is fixed in some tangible form, whether on paper, in a file, or in a recording. It does not protect ideas, facts, methods, or systems, so a competitor can usually describe the same concept or follow the same process in its own words. Names, titles, and short slogans generally fall outside it too, and those are usually trademark questions. Protection arises without any filing, although registration with the U.S. Copyright Office affects what you can do in a dispute. The law also permits certain uses without permission, fair use being the most familiar, and whether a particular use qualifies depends heavily on the facts rather than on any percentage or rule of thumb.
Who owns it
The author is usually the first owner. When an employee creates something within the scope of the job, the employer is generally treated as the author instead. Independent contractors are different: their work usually stays theirs unless there is a written assignment, because the work-made-for-hire label applies to commissioned work only in limited categories and only with a signed agreement. This is where many businesses discover that the logo, the website code, or the product photos they paid for were never transferred to them. Co-created work raises its own questions, especially when collaborators never discussed ownership. Material generated with artificial intelligence adds another layer, since the Copyright Office has taken the position that protection depends on human authorship.
When it is worth talking to a lawyer
People usually reach out before signing a contract that transfers or licenses rights, after finding their work used without permission, or after receiving a claim about something they published. Each calls for different preparation. For ownership questions, bring the agreements, invoices, and messages that show who made the work and on what terms. For a use you did not authorize, keep a record of where it appears and when you first noticed it. We use the first conversation to work out what you actually own, what you are free to do with it, and whether registration or a written assignment should come before anything else.
