op-return-protocol ✓ verified on-chain
Counterparty (XCP) — proof-of-burn genesis
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The protocol's first on-chain footprint is this proof-of-burn (block 278319, 2014-01-02). The first decodable CNTRPRTY-marked protocol message followed ten days later — see counterparty-first-message (block 280091, 2014-01-12).