Investigating "organizational maturity" in order to provide "blockchain banking service" based on "FinTech" (through "the CMMI" in "Parsian Bank")

Purpose - The description of "blockchain banking", the determination of "the sub-processes" of "blockchain banking" as a "business process", and the assessment of "maturity level" in Parsian Bank. Design/methodology/approach - Theoretical sources on "blockchain banking" were initially investigated. Then the "sub-processes" of "blockchain banking" as a "business process" were extracted by Parsian Bank's experts through the "Delphi method". Next, the "sequence" of the "sub-processes" was determined by means of the "AHP". Eventually, Parsian Bank's maturity levels for all the sub-processes as well as the overall maturity level were specified on the basis of the "CMMI" V1.3 in order for Business Process Management (BPM). Findings - Blockchain banking' combines traditional banking with cryptocurrencies, which can be provided by merging "hybrid e-wallet" with "bank account" and "bank card" - all together as "crypto bank account". Plus, "hybrid e-wallet" is a form of mobile e-wallet on blockchain that supports both cryptocurrencies and traditional currencies in the same platform by which the purchase and sale of cryptocurrencies are possible. Besides, "Blockchain banking service" can also be offered within the framework of "open banking" aligned with "open innovation" through a FinTech (or a beta bank) in collaboration with a licensed bank via "open API", which is called "blockchain banking based on FinTech". At last, the eight sub-processes of "blockchain banking" were determined and Parsian Bank's "maturity level" was specified. Originality/value - This is the very first practical guide to "blockchain banking service".