ERC-721
The ERC-721 Non-fungible Token Standard is a technical framework, defining a set of rules and interfaces for creating and managing unique, non-fungible tokens (NFTs) on the Ethereum blockchain.
ERC-721 is recognized for formalizing the concept of an NFT and establishing the foundation of the multi-billion dollar digital collectibles ecosystem that emerged alongside its adoption. It is one of the most widely used NFT standards across use cases and has been utilized in various high profile projects.
Source: Wikipedia
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