from what i understand you can only transfer the nft within the same mint

If that's the case then it may not be as interesting as I thought.

Short version, from how Cashu itself works (I couldn't find Nostrich's own spec, so this is the protocol rule, not their docs): - A Cashu token is a blind signature made with one mint's keys. Only that mint can check it and redeem it. The Cashu FAQ puts it plainly: each mint has its own tokens. - Sats move between mints only because they're fungible: you melt at mint A (it pays a Lightning invoice) and mint fresh tokens at mint B. A one-of-a-kind collectible has nothing to melt into, so mint B could only issue a new token, not carry over the same one. - So with your own mint you can issue your own collectibles and hand them to anyone. Person-to-person transfer is a normal swap at your mint (NUT-03). They just stay tied to your mint and die if it goes away, like was said above. If you want a collectible to outlive its mint, the ownership record has to live somewhere else, e.g. signed Nostr events, with the mint only handling the payment.

Frequently Asked Questions (FAQs) - Cashu.space

Frequently asked questions

NUT-03 - Swapping tokens - Cashu NUTs Specifications