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elsat | 5 months ago (raw) | root | parent | reply | flag 
 Are you thinking of adding the equivalent of sha256 hash to physical objects?

Welcome to nostr 💪
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ryan | 5 months ago (raw) | root | parent | reply | flag 
 If physics allows!
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elsat | 5 months ago (raw) | root | parent | reply | flag 
 QR code tattoos??

😃