npub1ce…ketlq on Nostr: In this system, can't I create a taproot key with pubkey (xG+tH) contributing ...

In this system, can't I create a taproot key with pubkey (xG+tH) contributing (xG+(t+v)H) to the curvetree, and use that to provide a false proof that I have t sats more than I ever had (and t+v sats more than I can spend, since such a pubkey is unspendable)?