Blockchain has been one of the key innovations in information technology in the last 15 years. An important aspect of applying blockchain technology is the creation of so-called non-fungible tokens (NFTs). Although the name resembles cryptocurrencies because of the word token, in practice, NFTs...

Blockchain-based NFTs (non-fungible tokens) are uniquely identifiable digital representations of physical or digital items. Usually, the tokens are indivisible into smaller units. NFTs represent structured metadata referring to physical or digital objects. The tokens act as separate identifier...