https://nftschool.dev/reference/metadata-schemas/#ethereum-and-evm-compatible-chains

https://docs.ipfs.io/how-to/best-practices-for-nft-data/#types-of-ipfs-links-and-when-to-use-them https://docs.opensea.io/docs/metadata-standards

https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1155.md#erc-1155-metadata-uri-json-schema https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md