BLS to Schnorr signature conversion? Imagine a situation where a prover can only sign with BLS signature signing algorithm, a verifier can only verify with Schnorr signature verification algorithm. Is it possible to convert a BLS signature to a Schnorr signature, so that a verifier who can only verify Schnorr signatures can verify derived signature given public key and message?
You can't convert the signature output from one algorithm to another, especially not ones relying on random oracles.