All bitcoin transaction can be seen by anyone and transaction with 550000 BTC certainly is very rare.
The sender or receiver can confirm it simply sign a message with necessary information (TX ID, court order, etc.)
yeah, wright sure knows how to provide people with signed messages from the blockchain

who wants to bet the next court case will be wright vs kleiman 2020, "where's the 550,000 BTC tx, craig" vs "why here it is, and here is the script that proves it was signed using this public key..."
couldn't he just do this forever? I've changed my mind about this case; I hope wright keeps up the shenanigans, keeps suing/getting sued and bankrupts the DOJ in the process