Blockchain technology enables artists to offer their digital/digitized works directly on online platforms (NFT marketplaces) and sell their paintings, animations, videos, collages, music, photographies, interactive works etc. in a self-determined manner. The NFT (Non Fungible Token) is a unique entry on the blockchain.This entry cannot be changed or deleted & certifies the authenticity of a file. Hopper' Gallery publish exclusively on the Tezos (xtz)Blockchain, as this cryptocurrency is decentralized & ecological with low energy consumption. Hopper's Gallery is currently using Teia.art & objkt.com and will be using other marketplaces such as Versum.xyz as prefered NFT marketplaces in the near future.