On Wed, May 20, 2015 at 3:25 AM, Emin Gün Sirer <el33th4x0r@gmail.com>
wrote:

> Hi everyone,
>
> Given the recent discussions on projects that use the Bitcoin blockchain
> to record factoids, people on this list might be interested in the Virtual
> Notary project. Virtual Notary is essentially an online witness (aka
> attestor) to online factoids. It can provide:
>
>   * proof of Bitcoin funds (without revealing public addresses or fund
> location on the blockchain)
>
>   * proof of Bitcoin address ownership
>
>   * proof of Tweet
>


For what it's worth, a subsidiary of Dunvegan Space Systems is pursuing
exactly this as a business.

EMail JGarzik@DSS.co if you want to know more.

-- 
Jeff Garzik
Bitcoin core developer and open source evangelist
BitPay, Inc.      https://bitpay.com/