actually, the manipulation you mention isn't possible. the image would be 'hashed' when included on the blockchain signature, and it's computationally impossibl

actually, the manipulation you mention isn't possible. the image would be 'hashed' when included on the blockchain signature, and it's computationally impossible to edit the image AND produce the same hash AND those changes being what you actually want the forgery to reflect. (producing the same haash is impossible enough)