As I pointed out in another post downthread, that is also the case in US jurisdictions that record deeds: if the deed transferring ownership isn't recorded with the county clerk, the transfer doesn't legally exist.
The difference, at least in many US jurisdictions, as I pointed out in that other post, is that in those US jurisdictions the county clerk does not guarantee that the deed is final, any other legal challenges notwithstanding. For example, I think someone else upthread gave the example of someone making a will in a different state that left property to their children instead of their spouse. When that person dies, yes, whoever is supposed to inherit the property would need to record a transfer deed in the county where the property is located to effect the transfer. But their legal right to do so depends on a will executed in a different state.
In many US jurisdictions, the county clerk is not responsible for checking to see if the person recording the transfer deed has the legal right to do so; that's up to other parties involved. But under the Torrens system you describe, it seems like the government land registry would have to do such a check in order to make the guarantee it makes. But how can it? It doesn't control or have access to things like wills in other jurisdictions that determine who has the legal right to take title to a property.
