Money 2.0 Stuff: Child pornography via OP_RETURNs

A major change in the Craig Wright / Faketoshi-led project is in the use of OP_RETURN, an old transaction type that allows users to store data on the Bitcoin blockchain. In a previous discussion of OP_RETURN, The Block's Steven Zheng discussed some of these uses:

Bitcoin enables users and businesses to embed 80 bytes of arbitrary data into its blockchain through OP_RETURN transactions ... The activation of OP_RETURN led to creative uses on Bitcoin. Businesses and users can now insert a variety of information, from simple messages to notarized documents, onto Bitcoin’s blockchain.