Only in the general sense that bitcoin is a system with some desirable properties of a decentralized torrent index. The list of all software with features desirable in a distributed torrent index is as long as my arm and it's arguably sensible to "investigate" any one of them.
But the grandparent poster didn't name many technologies, they singled out the bitcoin blockchain specifically. A technology that through the popularity of its function has made it a popular target to have other things bolted onto. But popularity of the blockchain hammer does not turn all problems into nails.
The Bitcoin blockchain solves the problem of maintaining a distributed public ledger such that changes are agreed upon by all and can't be changed retroactively.
You don't need any of that if you just want a torrent index. There's no need for consensus and no need to keep a secure record of the past. Bitcoin needs to prevent Joe from forging messages like, "Bob sent Joe one thousand bitcoins," but there's no corresponding scenario for torrents.
That said, I'm not quite sure why this needs a blockchain... A URI is either in the system or not in the system... Why would one need a consensus algorithm to store URLs?
