Individually identifiable digital representations of blockchain-based tangible or intangible objects called nonfungible tokens (NFTs) are not typically divided into smaller parts. Instead, structured metadata related to actual or virtual things is represented by NFTs. Often, the tokens are not connected to the objects and serve as distinct identifiers, advancing the interoperable commercialization of the physical or digital items, according to their proponents.

Hashes of files or other data were added to the Bitcoin blockchain in 2012 or 2013 to demonstrate their existence or legitimacy at a particular moment. This development served as the foundation for creating "Colored Coins," uniquely identified tokens, which are recognized by adding metadata to Bitcoin transactions.

Related: Fungible vs nonfungible tokens: What is the difference?

So, what is this metadata and how is it generated? In this article, we will explore these questions and also deep dive into how you can retrieve metadata of the NFT from the contract; how you read NFT files; and how you can view the metadata of any NFT.