Abstract: Systems and methods for fast and efficient retrieval of NFT ownership information are provided. An exemplary method includes initializing a mirror blockchain by making a copy of an NFT blockchain; initializing an ownership transaction table and an NFT ledger from a mirror NFT blockchain by processing the mirror blockchain from a beginning block to an end block; periodically update the mirror blockchain with new blocks from an NFT blockchain thereby forming a new end block; processing ownership transaction events that modify NFT ownership in the new blocks up to a fixed offset from the new end block; updating the ownership transaction table; updating the NFT ledger; receiving a request for all NFTs owned by a crypto-wallet address; generating a response with the NFTs owned by the crypto-wallet address from the NFT ledger; selecting an NFT group; and verifying the NFT ledger against the NFT blockchain ownership.

Abstract: Systems and methods for providing high performance access to NFT metadata including ownership information. An example method requests NFT metadata from a server that has cached NFT metadata extracted from a mirror NFT blockchain. Periodically, new blocks that have been added to an NFT blockchain are added to the mirror blockchain and processed to update a cache with metadata modifications. Additionally, the method includes requests for NFT ownership information. An ownership transaction table is generated and updated from the mirror blockchain. Ownership request can include requests for all the NFTs owned by a crypto-wallet address.