not quite first of all that’s not how the law works at all. you automatically own the copyright to anything you created. this is what when you buy a DVD, you don’t own the movie itself, what you’re effectively buying is an open ended licence to watch the movie, which would expire if you sold the DVD ect ect normally, if i drew a picture and sold it to you, you would own that physical copy or whatever i sold you, but the copyright to that art would stay with me so on fiverr, when you buy something you usually do get complete ownership by default, as per fiverrs T&C.if a seller offers “commercial rights”, and you don’t opt to buy them then you have a DVD, if you do then you have a DVD that you can use on in commercial, however the seller retains the copyright, unless you buy “full rights” instead. and that’s how it should be. (it’s less how it should be when the sellers are unclear about what you’re getting, but hay…) lastly, on fiverr voice over work has it’s own, bespoke set of rules, which means that you need that commercial licence, or else what you have is a copy of your advert which you have no more right to share then you’re abba records you can sell your house without paying the remodelers, since A), they probably don’t own any copyright on any aspect of their work and B) if they did, you would simply be selling your physical copy of that work