Reusable Proofs of Work (RPOW)
Hal Finney releases Reusable Proofs of Work (RPOW), creating a token system based on hashcash that served as a critical precursor to Bitcoin.
Only one person can claim August 15, 2004 (Sunday) in the Dateverse universe. It occupies chronological index position #19,951 in our 100-year timeline and was registered under Token ID #20040815.