Proof-of-capacity is also claimed to be ASIC Proof. Burstcoin's proof-of-capacity algorithm is based on proof-of-work, so theoretically one could compute the Proofs in real time. However, it is not currently possible to complete enough work to be done during a 4-minute time interval that even the most cost efficient ASIC could not mine efficiently enough to make it cheaper to use than a hard drive.