Blockchain-based request fulfillment

A system comprising

• memory configured to store a blockchain;
• and
• fulfillment circuitry configured to execute a fulfillment stack including:
• a chain layer;
• a request layer;
• and
• a fulfillment layer;
• the fulfillment circuitry configured to:
• receive, at the request layer, a request manifest linked to a requestor identification (ID) controlled by a request party, the request manifest including:
• a request specification that defines a request condition for fulfillment;
• and
• a space description defining an access space for one or more fulfillment IDs controlled by corresponding fulfillment parties;
• at the chain layer, request a request entry for storage in the blockchain, the request entry capturing content of the request manifest when the request manifest is encrypted to facilitate enforcement of the access space;
• based on the request entry and at the fulfillment layer, receive a fulfillment manifest linked to a selected fulfillment ID of the one or more fulfillment IDs, the fulfillment manifest configured to acknowledge the request condition;
• and
• at the chain layer, request a fulfillment entry for storage in the blockchain, the fulfillment entry capturing content of the fulfillment manifest when the fulfillment manifest is encrypted to facilitate enforcement of the access space.