Publish it with a key owned by the nostr.build service specifically for these matters and tell clients what that key is so they can trust it.
I’ll propose a PR to add trusted npub in the nip96 JSON. Probably a list of them, to allow rotation, etc
Anarchist Meditation2 #test2 https://image.nostr.build/bf91c069611c97ad8983c1aeed444e8bc16ee5293416c6b50a444317608765a1.jpg