j"19HxigV4QyBv3tHpQVcUEQyq1pzZVdoAutLúThe way I understand it, it is a publicly accessible database of paymail users.
So, instead of moneybutton having the list internally, or handcash having them internally, the list for all paymail users is stored openly on the #Bitcoin blockchain.
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BITCOIN_ECDSA"1AKHViYgBGbmxi8qiJkNvoHNeDu9m3MfPELXIDbf3T5WSW0We/nl5YBmSRrUo5LFWSdAh0q3bYRZXle1F7zgSGDK1nIsH1iwn/Y8X50maKVwFQN8F5wpljuXhjE=
https://whatsonchain.com/tx/79cef96e8e25b1d169214f9df5f336fb8e3fe5c8b3f9323195616a1e8b66bd4c