receiving a cryptocurrency transaction request from a front-end server that interfaces with a requestor user device, the cryptocurrency transaction request identifying at least a hot wallet accountholder identifier;

determining, at a manager server, a first set of authentication factor servers to authenticate the cryptocurrency transaction request, each authentication factor server utilizing a different authentication factor;

requesting the first set of the authentication factor servers to verify a requester of the cryptocurrency transaction request against an accountholder profile associated with the hot wallet accountholder identifier;

authenticating, via the authentication factor servers operating independently of each other, the cryptocurrency transaction request based on the accountholder profile, wherein authenticating the cryptocurrency transaction request includes the authentication factor servers independently approving the cryptocurrency transaction request by cryptographically signing approval messages with respective private authentication keys of the authentication factor servers, each of the authentication factor servers approving when the requester is verified; and

aggregating, via the aggregation server, the approval messages respectively having cryptographic signatures of the cryptocurrency transaction request from the authentication factor servers to publish the cryptocurrency transaction request into a cryptocurrency network.

in response to receiving the cryptographic signatures, generating a transaction broadcast message based on the cryptocurrency transaction request, the transaction broadcast message specifying at least a public destination address and one or more cryptocurrency source addresses to draw value from, wherein the one or more cryptocurrency source addresses are selected from a shared pool of cryptocurrency addresses available to multiple accountholders in the hot wallet service system and wherein the transaction broadcast message is signed with private cryptocurrency keys corresponding to the one or more cryptocurrency source addresses;

providing the transaction broadcast message to one or more computer nodes in the cryptocurrency network.

in response to receiving the cryptographic signatures, generating a transaction broadcast message based on the cryptocurrency transaction request, the transaction broadcast message specifying at least a public destination address and one or more cryptocurrency source addresses to draw value from, wherein the one or more cryptocurrency source addresses are selected from a private pool of cryptocurrency addresses available to the hot wallet accountholder identifier and wherein the transaction broadcast message is signed with private cryptocurrency keys corresponding to the one or more cryptocurrency source addresses;

providing the transaction broadcast message to one or more computer nodes in the cryptocurrency network.

determining an approval ratio of the authentication factor servers in the first set that have cryptographically signed the approval messages to the aggregation server; and

cryptographically signing a transaction broadcast message based on the cryptocurrency transaction request when the approval ratio is above a ratio threshold.

receiving approval messages of a cryptocurrency transaction independently from multiple authentication servers that independently verify a requester is authorized to initiate the cryptocurrency transaction, the approval messages having separate and different cryptographic signatures generated at the multiple authentication servers based on different private keys stored respectively therein;

verifying the cryptographic signatures utilizing public keys corresponding to the private keys;

determining that a number of the cryptographic signatures received for the cryptocurrency transaction meets a sufficiency threshold;

signing a transaction broadcast message with one or more cryptocurrency private keys corresponding to one or more public cryptocurrency addresses that fund the cryptocurrency transaction when the number of the cryptographic signatures meets the sufficiency threshold and when the cryptographic signatures are verified; and

providing the transaction broadcast message to a cryptocurrency network to propagate the cryptocurrency transaction.

a manager server configured to receive a cryptocurrency transaction request identifying at least a hot wallet accountholder identifier and to determine a first set of authentication factor servers to authenticate the cryptocurrency transaction request;

the authentication factor servers, each configured to independently authenticate the cryptocurrency transaction request by verifying a requester of the cryptocurrency transaction request against an accountholder profile associated with the hot wallet accountholder identifier;

wherein the authentication factor servers are configured to approve, independently from each other, the cryptocurrency transaction request by cryptographically signing approval messages to send to an aggregation server using respective private authentication keys stored respectively in the authentication factor servers when the requester is verified; and

the aggregation server configured to aggregate cryptographic signatures of the cryptocurrency transaction request from the authentication factor servers to publish the cryptocurrency transaction request into a cryptocurrency network.

a front-end server configured to interface with a requestor user device and to initiate the cryptocurrency transaction request based on interactions with the requestor device.

verify the cryptographic signatures utilizing public keys corresponding to the private authentication keys respectively used by the authentication factor servers to generate the cryptographic signatures;

determine that a number of the cryptographic signatures meets a sufficiency threshold;

sign a transaction broadcast message with one or more cryptocurrency private keys corresponding to one or more public cryptocurrency addresses that fund the cryptocurrency transaction request when the number of the cryptographic signatures meets the sufficiency threshold and when the cryptographic signatures are verified; and

provide the transaction broadcast message to one or more computing nodes of the cryptocurrency network to propagate the cryptocurrency transaction request.