In fairness, identity is hard, and the idea put forward is ambitious, but the scheme is unlikely to achieve what it purports to. Identity is a social, not biological construct.
In the prison system, for instance, prisoners are often present under assumed names. In some circumstances it is hard for courts to prove who someone is, even if it is nailed on what they did. Some markers (tattoos, scars, etc) help but approaches to identity often miss the innately situational nature of the thing.