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STAMPS: A Protocol for Storing Images On-Chain in Transaction Outputs Immutably on Bitcoin IMPORTANT NOTICE: STAMPS IS A BLOCKCHAIN-AGNOSTIC PROTOCOL. FOR RULES SPECIFIC TO THE BITCOIN STAMPS PROJECT, PLEASE VISIT: Storing "Art on the Blockchain" as a method of achieving permanence is often a misnomer in the NFT world. Most NFTs are merely image pointers to centralized hosting or stored on-chain in prunable witness data. We propose a method of embedding base64-formatted image data using transaction outputs in a novel fashion. The means by which this is achieved is encoding an image's binary content to a base64 string, placing this string as a suffix to STAMP: in a transaction's description key, and then broadcasting it using the Counterparty protocol onto the Bitcoin ledger.