Abstract: A method of coordinating by a server computer with a processor and memory, the server computer in communication with a network, receiving a profile information from a mobile device of a first user over the network; associating the received profile information of the first user with an account of the first user; receiving a calendar slot from the mobile device of the first user over the network; and receiving a communication type from the mobile device of the first user, related to the calendar slot over the network. Receiving a request from a mobile device of a second user over the network, to secure the calendar slot of the first user, wherein an account of the second user is previously associated to the second user; receiving a blockchain token from an account associated with the second user over the network; establishing a smart contract.