>    Could this approach work? Perhaps there’s existing research on similar
>    methods?

Brandon, I blockchain and BGP were discussed on NANOG some years ago, back
when the deployment of RPKI was brought up. Short answer - it won't solve jack
and will use tons of computation power.

I'm not really going to go into details, but essentially adding a band-aid
instead of adopting RPKI and addressing the issues with RIR is not the best
course of action.

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Roman V Tatarnikov | https://linkedin.com/in/rtatarnikov