This might be a late answer, but just in case it is not, or others might be searching; all creation that might attract intellectual issues, an Intellectual property form must be completed and signed by the creator. If the artist (stock contributor) is the creator of the art, or asset, then the artist will sign as the property owner, as well as the artist and have the form witnessed and signed by someone else. All dates must match. If the electronic method is used, then no witness is required. Fill out the artists information and enter your e-mail address as the owner, the form will be sent back to you for your signature.