A PDF of my Watsi donation and credit card statement is just as good without any blockchain Rube Goldberg mechanizations. By all means, digitally sign the PDF [1] if you want to be fancy and hip, but you don't need a blockchain, nor is it going to tell you if the healthcare donated towards was actually delivered.

If the argument is, "It's on the blockchain for trust purposes!" my retort is, "Do you not trust the nonprofit? And if you don't, why are you giving them money?"

Please, do donate to non profits that align with your philanthropy interests, but don't get caught up in hype.

[1] https://helpx.adobe.com/acrobat/using/certificate-based-sign...

Watsi seems to offer donations via credit cards and Paypal, neither which I think supports $2.4 Mil donations, but I'm unsure, never tried it myself. Watsi overall don't seem to fit the "no restrictions on who can donate" part either, as they are an American non-profit (subject to US laws, including embargoes).

Can you name a non profit not governed by nation state monetary and financial regulation policy you'd donate to? I cannot.

If I was going to donate a substantial sum to Watsi, I would wire it to them and have the wire receipt as proof of money transmittal.