The KYC requirement for bounty after the end of tokensale totally looks like SCAM for community members.

You have many ways to distribute bounty tokens.

For example, you can transfer all token to bounty manager (with KYC) in one transactions and then redistribute from bounty managers' personal wallet across all bounty participants.

Or you can simple process all bounties without KYC, as all the normal people do.

In any case I hope you will find the good way not to SCAM the community with KYC requirement after your bounty campaign ends.