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Adam Back, CEO and co-founder of Blockstream, comments on Bitcoin transaction structure. He points out that users can utilize two op return codes, such as 0x6a 0x6a, despite some developers including those behind bip110 expressing opposition to this approach.
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Back previously advised users of compromised hardware wallets to transfer funds while retaining the original device for proof, according to guidance regarding COLDCARD wallets. In an earlier reflection, he described 2013 as a critical year for learning about Bitcoin's technical underpinnings and security, as detailed in his review of protocol developments. These experiences inform Back's ongoing commentary on Bitcoin transaction structures.