A decentralised purchasing platform dedicated to photographic and video fine art, which gives value to artworks thanks to the technology that emerges in the blockchain and which certifies the authenticity of an asset. This system can make a non-fungible asset unique by filling in smart contracts, i.e. contracts stipulated between two parties and validated by the network. The execution of this algorithm gives rise to the creation of a token that is connected to the work, takes on the name of NFT (Non Fungible Token). The NFT is, in our case, the artwork itself, which will take on a value and that can be bought and sold within the Uncontaminated platform itself.