[vintermann]

Any application where you need an immutable ledger, and

1. You can't trust any single known party, or group of parties, to attest the integrity of the ledger (otherwise, you could just use plain old digital signatures)

2. You need infinite pseudonymous accounts in this ledger.

3. You need it so badly that you're willing to forgo a significant share of whatever value having this ledger creates, regularly, forever (mining fees).

There have been attempts to rebrand blockchain as anything containing a chain of digital signatures, no mining needed. In which case it's old technology - but in that case I also agree that it has a use.

Artists are by their nature known parties, as are factors in a supply chain. They may have a use for digital signatures, but they have no use for a scheme including mining.