... but it may not be as useful as you expect.
well, for the period of not spending from a given address, that could be useful
i've been thinking about it lately, because we are going to print bitcoins on paper and let them circulate as a party gig. (a hacker space opening party). using the QR code you'd scan from the paper and receive the address compliant with the bitcoin convetion. a block chain examiner would answer a request to see if the balance of that paper bitcoin is any. there should be at least 1 answer, receiving bitcoins to that address
unless you'd scratch the part with pvt and pub key you would not be able to spend it, but you'd see if it is still valid (i.ex. the issuer did not spend it for you) or if some didn't increase it's value (you would see all transactions, also incoming transactions past the issue date).
if it's a home business or a bitcoin savings account, before first spend it should be a valid observation.
1LkueDXZ8vceC5N2AxPcFZWSRKD1wQQcEJ
17WWPGEcyx7LQV2E86dBYT3sPa3ufpqfrk
197y5xP9WKyGnLQo2CdSr6sXNbboRsmDsH
1E9uhmsry9hPJ1mw5gQaFDz3Q4W7QGUBoC
14uDRe961eQyaDfhbTmVme66tmUYoZUneo
1AQnrb93Gwr6HiwinbCZEvDuzAcB2mEzwB
1L2KkxqVbJp8hWW6146QFuF8TxVcE9CuML
18wxDNBZLNXzaKiatmkDTgZ5hpst7E9YLy
15NTVqZA2NcHVgfBjMmGtcUuUmsJsiEcx1
1dq8DpRAeuHer8bUtp4HAeZwnBYyCEkYP
^^ this is the first 10 bitcoins to be printed
feel free to check their value and follow changes in time.
the party is next w-e. with more sponsors, the addresses could get more btc.
but yes, once spent (even partially), the remaining amount would be transferred to a new address and all future incoming payments would be sent away as well.
