Add registry systems.

[simondlr]

Monegraph is an art registry system: http://www.monegraph.com/.

If other registry systems exist, let me know.

[simondlr]

Another one to add here is provenance for wines. http://blog.vinfolio.com/2014/10/06/the-future-of-wine-provenance-is-bitcoin/

[simondlr]

& D.A. Wallach's right's tracking system for the music industry: https://medium.com/backchannel/bitcoin-for-rockstars-ca8366802f9

[simondlr]

Rob Myer's artworld: http://robmyers.org/2014/07/24/ethereum-art-market/

[simondlr]

SKUChain (provenance)

[simondlr]

https://github.com/mine-code/canonical-content-registry

[simondlr]

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