I’m talking about situations where the government is corrupt and can erase your data or documents when you leave the country. Then, when you come back, you’ve got nothing to claim.
I think in this case, the government must recognize the blockchain recording as legitimate. Even with all the technology of recording is at hand, if the government does not recognize it, it will only be in vain. They will still accept the documents that is valid for them.
With that I can say it is possible that Bitcoin blockchain records can protect land rights if the government acknowledge it as legitimate documents as proof of ownership.