Which custodians does the Prometheum ATS platform support? 25 October 2022 18:39 Updated Prometheum ATS supports Anchorage Digital Bank (www.anchorage.com). Related articles Who is my custodian? How do I update my address? Is Prometheum ATS registered? How long does it take for a trade to show up in my custodial account? How do I contact Anchorage Digital Bank?