About this artifact
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Stored at 80 × 40 px · shown at 7× Written to the chain on 24 Jan 2022.
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OP_RETURN explicitly marks an output as unspendable and lets it carry a small data payload. Unlike fake-address methods, it does not create a spendable-looking UTXO. That makes it the least deceptive standard way to place small data on-chain.
More about OP_RETURNEvery byte shown here was read from these transactions. Open one in a block explorer to check it yourself.