U.S. Bitcoin mining corporation Marathon mined its first “compliant block” about a week after diverting all of its hashing power to its new “compliant mining pool” (which was announced about a month prior). The following is an excerpt from Marathon’s press release:
On March 30, Marathon announced that it was launching the first Bitcoin mining pool based in North America that is fully compliant with U.S. regulations, including AML and OFAC’s standards. The mining pool refrains from processing transactions from those listed on the U.S. Department of Treasury’s Specially Designated Nationals and Blocked Persons List (SDN), […].
On May 1, Marathon began directing all of its hashrate to the new mining pool. As a result, all bitcoin that Marathon produces from May 1 onwards will be produced in a manner that complies with U.S. regulatory standards.
The block’s coinbase transaction contained data which, in part, read “MARA Pool - OFAC Compliant Block.”