You should check out Proof-of-Sacrifice as first proposed by Mike
Hearn in https://medium.com/bitcoin-talk/d3f9f299f729 - it's worth
reading.

On 19 May 2014 11:56, Liad Shababo <liad@???> wrote:
> Have been riffing on this idea for a bit. Would appreciate thoughts/feedback
>
> Problem:
>
> Continued growth of the sharing economy and p2p marketplaces necessitates a
> global distributed and repurposable (real name/pseudonymous/anonymous) trust
> and reputation system. A mechanism is needed which will allow strangers to
> gauge whether to interact/transact with each other across 'n' services and
> use-cases. Trusted Identities would engender trade, relationships,
> serendipity and more.
>
> A possible solution:
>
> Proof of burn represents a sacrifice of value in order to establish a
> trusted identity. By making a trusted identity expensive to obtain it can be
> trusted not to engage in bad behaviour, as doing so would cause the identity
> to become destroyed if tarnished thereby rendering the sacrifice and
> identity useless.
>
> Third parties can easily verify the value sacrificed to establish your
> trusted identity and use it as a proxy to decide whether to:
>
> 1) rent their room to you on Airbnb
>
> 2) go on a date with you after meeting you on Tinder
>
> 3) accept you for a ride on Lyft
>
> 4) back your projects on Kickstarter
>
> 5) loan you money through crowdlending
>
> etc etc.
>
> MVP:
>
> A web app which generates a verifiably unspendable bitcoin address to which
> you would send an arbitrary amount of btc (proof of burn). The service would
> then link the transaction hash of the payment to an existing online identity
> of your choosing and provide you a profile page which acts as public proof
> of your trusted identity.
>
>
> In the event of bad behaviour, aggrieved parties can leave public comments
> on your proof page for others to see. The service itself would not blacklist
> your identity based on negative feedback, merely display it for others to
> judge as they see fit. (Third party services could create blacklists off the
> data much in the same way SpamAssassin and others do to IP addresses). Over
> time we create a global trust network
>
>
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