How to extract the URL of a crypto art as it appears within the NFT? and technical details like ERC-token type?
If crypto art is stored off-chain, how does the collector have any control over their NFT's contents if the server where it is saved shuts down?
How can Opensea and Etherscan understand that CryptoPunks are NFTs if the contract does not implement ERC20, ERC721 nor ERC1155?
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