The companions

The declared companions. One copy, one companion: each declares with the ownership address of their copy, and becomes active as soon as the sale of that copy is settled (until then they are pending, and a sale through their link is a direct sale). The fingerprint of the reference copy can be found in the engraved register. The address is complete, in numbered groups of four characters: at the payout, the Cave asks for two pieces of eight characters of the address of each companion never paid before (for example characters 13 to 20 and 29 to 36) to be typed again; the author reads them here, on his phone.