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  "map_content": "OP_RETURN is a Bitcoin script opcode (represented as 0x6a in hex) used to embed small amounts of arbitrary data directly into the Bitcoin blockchain.\r\nlearnmeabitcoin.com\r\nWhat it does:\r\nIt creates a special transaction output that is provably unspendable (also called a \"nulldata\" output).\r\nAny Bitcoin sent to an OP_RETURN output is effectively burned (permanently locked and cannot be spent).\r\nThe main purpose is to attach metadata or arbitrary data (e.g., text, hashes, or references) to the blockchain without interfering with normal Bitcoin transactions.\r\nHow it works:An OP_RETURN output typically looks like this in the locking script (scriptPubKey):OP_RETURN <data>\r\nThe opcode causes the script to fail immediately when someone tries to spend it.\r\nThis tells Bitcoin nodes that the output can be safely ignored for the UTXO set (it doesn't bloat the set of spendable coins).\r\nCommon uses:\r\nProof of existence / document timestamping (e.g., hashing a file and embedding the hash).\r\nMetadata storage for tokens, NFTs, or protocols built on Bitcoin (like Ordinals, Stamps, or other layer-2 solutions).\r\nCommitment schemes (anchoring data from other blockchains or systems).\r\nMessages or small notes.\r\nLimits:\r\nOriginally limited to 40 bytes, later increased to 80 bytes.\r\nIn 2025 (Bitcoin Core v30+), the limit was significantly relaxed or removed in some implementations, allowing much larger data.\r\noakresearch.io\r\nOP_RETURN was introduced as a compromise: it gives people a clean, standardized way to store data on Bitcoin while making it easy for nodes to prune the data and avoid network abuse.",
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  "timestamp": "2026-05-27T13:49:32.000Z",
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