at BTC Prague with nostr:npub1zga04e73s7ard4kaektaha9vckdwll3y8auztyhl3uj764ua7vrqc7ppvc nostr:npub1spdnfacgsd7lk0nlqkq443tkq4jx9z6c6ksvaquuewmw7d3qltpslcq6j7 nostr:npub13t9z3hhvsua67hzgh8086ztz5vxt0pk82h6g7vqkcke67nvejrmq3fzec6