Adam Back was printed for OPP Series 4 - The Simulation, part of Bitcoin Trading Cards, a collector line that borrows its scarcity model straight from crypto. It is card 79 of 147 in the set. The art is by WorldofRusty. /500 is the serialised version, held to 500.
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Adam Back is the cypherpunk who built the foundation before the world was ready. His creation, Hashcash, introduced the concept of proof-of-work - the cryptographic heartbeat that powers Bitcoin today. A relentless builder and defender of privacy, Back stands as a guardian of the original cypherpunk ethos: code as resistance, and freedom through math.
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