coinscrum and proof of work: tools for the future December 10, 2014 by Satoshi Pollen (IamSatoshi Documentary) CoinScrum and Proof of Work: Tools for the Future Gavin Wood discusses CoinScrum and Proof of Work: Tools for the Future, recorded by IamSatoshi in London 2014 by Satoshi Pollen (IamSatoshi Documentary), December 10, 2014