I welcome being disproven, but I don't think you've done that. Blockchains have a head, and the head is advanced somehow. How does your identity chain advance? Who has the authority to advance it? Without proof of work, you have a Merkle tree. Without rewards, what is the incentive to compete proof of work?

Regarding identity and authorization, you haven't even made an argument. Mine is https://github.com/nostr-protocol/nips/pull/1450