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/