I have been following the market of NFT closely lately and I even asked several people involved. Nobody could yet answer me questions such as: -As the owner o

I have been following the market of NFT closely lately and I even asked several people involved. Nobody could yet answer me questions such as: -As the owner of an NFT that represents a digital object, lets say an image. How can I be sure there is no other NFT representing the exact same image? How can I be sure there is no other NFT representing the image in another format? Can I claim anything (ownership, royalty fees, ...) of the digital object that the NFT in my possession represents? Would that claim hold up in any court in this world? For physical objects the same questions can be asked.