Abstract: A method and system for long-term authentication of non-fungible tokens is described. In various embodiments the system includes an off-chain storage system having one or more elements of identifying information for an object including at least one element that authenticates the object. In various embodiments the system further includes a blockchain network adapted for recording a non-fungible token located at a public address on a blockchain. In embodiments the minted non-fungible token includes at least an identification manifest and/or a hash of all or part of the elements of identifying information and/or a digital NFT certificate including a digital signature from a certifying authority and the hash of at least one of said elements of identifying information and/or of the identification manifest, such that the non-fungible token is independently authenticatable against said certifying authority and/or a corresponding validating authority and/or against the off-chain storage system.