I would like to clarify how your biometric recognition system will work specifically. Besides the internet connection, which devices should it use?
For the local application of the technology (as well as for any biometric identification technology) internet is not needed. The local application of the technology can be used for the security of smartphone, car, home etc.
The internet and Blockchain platform is needed for the distant identification of the user. For example, for the sales assistant and customer, service provider and receiver.