A plurality of computer-based transactions facilitated by each of a plurality of custodians are monitored. A first transaction of the plurality of transactions includes a transfer of an amount of cryptocurrency of a first type by a first counterparty to a second counterparty in exchange for an amount of cryptocurrency of a second, different type. Transaction packages are generated by each counterparty which include requisite information to effect the transfer. A settlement coordinator asynchronously receives (via a computing network) the transaction packages which specify information required to (i) transfer the cryptocurrency of the first type from the first counterparty to the second counterparty on a first blockchain and (ii) transfer the cryptocurrency of the second type from the second counterparty to the first counterparty on a second blockchain. The settlement coordinator after receiving the first request and the second request accesses the first blockchain and the second blockchain to transfer ownership of the cryptocurrency of the first type and the cryptocurrency of the second type to effect the first transaction.