Looks like this if for trusted providers of a given service as opposed to the ability to signal 'I believe this specific thing x to be true'.

So, nostr:nprofile1qqsra2ey033mkdwl5w8q0jss9ak69zafh82xsuvhwsaauw3trkq2amgpz9mhxue69uhkummnw3ezuamfdejj7qgcwaehxw309anxjmr5v4ezumn0wd68ytnhd9hx2tck28qzu could be a trusted provider of Proof of Place Assertions (using this NIP); however the Assertion itself would need to be signalled elsewhere, perhaps a different Attestation NIP.

Did I get that right? 

 You can def do Place scores and things like that. I don't know what other assertions it would need to be signalled, but it could be added.  

 See the Attestations section here:

nostr:naddr1qq2nya2z2akk6j60w9jz6vpeweg4vn2g8pvrqq3qcn670f663n3ks02jnnlsvd5y88zjnefy8343ykaxs7y3nzzketrsxpqqqp65wstzn6c 

 The Attestation Provider and the Attestation itself are distinct. 

 Nice! Yeah, it feels like BTC Map can attest for who currenctly controls each place in this PR. We just need to create a new kind with the d-tag equals to the identifier of the place. That event would then have a "result" field with the pubkey of the current owner.

Or maybe the opposite, the event's d-tag is the user and BTC Map lists the locations that user owns.