BlackRock introduced six major changes and cash holdings in its Bitcoin management and operation structure in the amendment to the iShares Bitcoin Trust S-1 form. BlackRock's last update introduced 21 core amendments, but the content shown in the December 18th document is much less, which may indicate the final improvements before release, and Coinbase has transitioned to Prime as the executing agent.

Coinbase's role has shifted from a primary broker to a primary executing agent, indicating that Coinbase's responsibility for BlackRock's ETF may have changed. As the primary executing agent, Coinbase's main role is to represent the ETF in processing buy and sell orders, rather than providing the broader services typically associated with primary brokers. (Cryptoslate)