global blockchain identity

I thought the discussion on global blockchain identity was quite
interesting.

It seems to me that block chains contain several types of identifiers, some
for addresses, some for transactions, some for headers etc.

I think in satoshi's original block chain the bitcoin:<address> type
indirect identifier makes a lot of sense.  But in a true super ledger
probably should should be extensible to allow things like http addresses
and free form uris so that you can fund a web page, email address, phone
etc.

Strangely for someone as smart as satoshi, he left the scheme off the block
chain, but I suppose this was necessary for compacting the blocks and
increasing transactions per second.

I'd like to see a future where block chain technology and global identity
come together in an elegant way on the web.  The best fit solution to me,
to date seems to be WebID, but I'd love to hear other views.