Abstract: A digital derivative is a cryptographic- and blockchain-based financial product that governs capital investments in blockchain mining infrastructure. The digital derivative resembles a bond financial product that utilizes blockchain protocols for principal, interest, and payment aspects. A secured hashrate is delivered by the issuer for the lifetime of the digital derivative. Income is generated in the cryptocurrency being mined, and the issuer may elect (prior to issuance) to repay the principal in the mined cryptocurrency. A cryptographic variable interest rate is calculated in the mined cryptocurrency based on the secured hashrate and a protocol-reported network difficulty.