Method for securing the processing of an initial digital asset according to at least one processing step delivering an output digital asset from an input digital asset which is a function of said initial digital asset, said input digital asset and said output digital asset being associated to corresponding access conditions, said at least one processing step being executed by at least one processor electronic device communicatively connected to at least one server (120a, 120b, 120c) implementing a blockchain, wherein a producer electronic device, communicatively connected to said at least one server, executes: - creating an initial NFT assigned to a producer wallet associated with said producer electronic device in said blockchain, said initial NFT being associated with said initial digital asset, said initial NFT comprising: - input access conditions, to the initial digital asset before execution of a first processing step among said at least one processing step, said first processing step delivering a first output digital asset from said initial digital asset; and for said at least one processing step delivering an output digital asset from an input digital asset which is a function of said initial digital asset, said initial NFT comprises: - post-processing access conditions to the input digital asset after the execution of the processing step; and - output access conditions to the output digital asset delivered by the processing step, at least one of said input digital asset being said initial digital asset, the respective output digital asset being said first output digital asset; - assigning the initial NFT to a wallet, in said blockchain, associated with a first processor electronic device implementing said first processing step. - creating an initial NFT assigned to a producer wallet associated with said producer electronic device in said blockchain, said initial NFT being associated with said initial digital asset, said initial NFT comprising: - input access conditions, to the initial digital asset before execution of a first processing step among said at least one processing step, said first processing step delivering a first output digital asset from said initial digital asset; and for said at least one processing step delivering an output digital asset from an input digital asset which is a function of said initial digital asset, said initial NFT comprises: - post-processing access conditions to the input digital asset after the execution of the processing step; and - output access conditions to the output digital asset delivered by the processing step, at least one of said input digital asset being said initial digital asset, the respective output digital asset being said first output digital asset; - input access conditions, to the initial digital asset before execution of a first processing step among said at least one processing step, said first processing step delivering a first output digital asset from said initial digital asset; and for said at least one processing step delivering an output digital asset from an input digital asset which is a function of said initial digital asset, said initial NFT comprises: - post-processing access conditions to the input digital asset after the execution of the processing step; and - output access conditions to the output digital asset delivered by the processing step, at least one of said input digital asset being said initial digital asset, the respective output digital asset being said first output digital asset; for said at least one processing step delivering an output digital asset from an input digital asset which is a function of said initial digital asset, said initial NFT comprises: - post-processing access conditions to the input digital asset after the execution of the processing step; and - output access conditions to the output digital asset delivered by the processing step, - post-processing access conditions to the input digital asset after the execution of the processing step; and - output access conditions to the output digital asset delivered by the processing step, at least one of said input digital asset being said initial digital asset, the respective output digital asset being said first output digital asset; - assigning the initial NFT to a wallet, in said blockchain, associated with a first processor electronic device implementing said first processing step.