A device, that is part of a network of nodes that has access to a blockchain, may receive, from a user device associated with an entity, a request for campaign information for a campaign. The request may include data identifying campaign parameters. The device may interact with smart contracts associated with the blockchain to identify individuals to target for the campaign. The smart contracts may be configured to receive the campaign parameters as input and to output an indication of whether campaign preferences are compatible with the campaign parameters. The device may generate the campaign information to include information identifying the individuals targeted for the campaign and information identifying particular campaign preferences found to be compatible with particular campaign parameters. The device may provide the campaign information to the user device to permit the user device to use the campaign information to target the individuals for the campaign.