The immutable smart contracts at issue in this appeal are not property because they are not capable of being owned. More than one thousand volunteers participated in a “trusted setup ceremony” to “irrevocably remov[e] the option for anyone to update, remove, or otherwise control those lines of code.” And as a result, no one can “exclude” anyone from using the Tornado Cash pool smart contracts. In fact, because these immutable smart contracts are unchangeable and unremovable, they remain available for anyone to use and “the targeted North Korean wrongdoers are not actually blocked from retrieving their assets,” even under the sanctions regime. Simply put, regardless of OFAC’s designation of Tornado Cash, the immutable
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