The issue of copyright for AI-generated art is a complex and evolving area, as the traditional concepts of authorship and originality are being challenged by the rise of AI-generated content.
Some experts argue that since the algorithm is the primary creator of the artwork, it should be considered the "author" and given the legal rights to the work. However, others argue that the person or organization that created and trained the algorithm should be considered the "author."
Currently, the law regarding AI-generated art and copyright varies by country and is not well-defined in many cases. In some jurisdictions, it may be possible to claim copyright protection for AI-generated works if they are sufficiently original and creative. However, in many cases, AI-generated works may not be considered original enough to warrant copyright protection.
The use of AI in art creation also raises broader ethical questions about the role of technology in the creative process, and whether AI-generated art can truly be considered "art." Until the legal and ethical issues surrounding AI and copyright are more clearly defined, it will likely remain a contested and evolving area of law.
With Midjourney, a paid subscriber is given commercial usage rights for the images they generate. If you then use your art in a card deck, for example, you have created a whole new thing with the images, and should be covered by normal copyright. You would have seen people create card deck images with collage and they then own the copyright of the images even though they have used other people's images in their collage.