Ключевые слова: abstract, approved, background, block, blockchain, blocks, checked, checking, chemistry, code, consensus, cryptocurrency, cryptographic, cryptographic token, cube, database, date, digital, digital asset, digital ledger, distributed ledger, exchange, game, individualized, information, information technology, innovation, internet, it, item, linked, metaverse, network, nft, nonfungible token, not fungible, online, recorded, technology, token, tokenized, transaction, unit, verified, virtual, web,