Operating an online marketplace using blockchain-based software technology and smart contracts for buyers and sellers of, and for maintaining a registry of, digital collectibles in the nature of downloadable multimedia files containing artwork in the field of smartwatch faces authenticated by non-fungible tokens (NFTs)

'artwork':35 'authent':42 'base':8 'blockchain':7 'blockchain-bas':6 'buyer':15 'collect':26 'contain':34 'contract':13 'digit':25 'download':31 'face':41 'field':38 'file':33 'fungibl':46 'maintain':21 'marketplac':4 'multimedia':32 'natur':29 'nfts':48 'non':45 'non-fung':44 'onlin':3 'oper':1 'registri':23 'seller':17 'smart':12 'smartwatch':40 'softwar':9 'technolog':10 'token':47 'use':5

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