Start non-profit for that purpose that will manage the database.
Ther database will hold only entries signed by telco companies. Some rules will apply on what happens when a number changes.
Everyone gets access to the raw database, and to query the database.
In case of mismatches there will be an agreed arbitration process, with agreed upon fines to the party no being responsible. This or some other contract.
This sort of solves the problem.
The key win in the blockchain - is the decentralization. But we know, in the real world how to arrange cooperation using centralization. it works. It's done every day. So this case is mostly useful when you want to avoid regulation.
Another win of the blockchain - a lot of work has been done verifying that it is secure. It probably is the mose secure system for those sort of problems. And that's a good reason to use it in many places.
I'm not sure I agree that blockchain is the most secure solution for common problems.
Let's say you get a computer virus that steals your banking credentials and transfers your money to someone else's account. In the traditional banking system, it's often possible to reset passwords and reverse transactions, especially if you catch the bad behavior quickly. With Bitcoin, your money is gone forever and it is mathematically impossible for you to ever get it back.
That's true for Bitcoin because it's almost impossible to get most miners and nodes to agree to reversing such a mistake, it's completely against the spirit of the project.
But in the example above that could still be easily fixed, you'd just need the companies involved to agree to reverse the mistake, as they are the miners of the chain.
Ther database will hold only entries signed by telco companies. Some rules will apply on what happens when a number changes.
Everyone gets access to the raw database, and to query the database.
In case of mismatches there will be an agreed arbitration process, with agreed upon fines to the party no being responsible. This or some other contract.
This sort of solves the problem.
The key win in the blockchain - is the decentralization. But we know, in the real world how to arrange cooperation using centralization. it works. It's done every day. So this case is mostly useful when you want to avoid regulation.
Another win of the blockchain - a lot of work has been done verifying that it is secure. It probably is the mose secure system for those sort of problems. And that's a good reason to use it in many places.