I'm not quite sure what the "Tip" is.

Our local bike co-op calls the local PD to check the serial number of every bike they get donated before reselling it.

That does look like a serial number has been ground off the bottom bracket. A HUGE red flag.

However, if you think you know the brand and model of the bike, call the police department with a description to look up.

At least I do that with the Stolen Bikes Registry (which may be primarily USA).
https://bikeindex.org/

Ahh.. perhaps here?
https://stolen-bikes.co.uk/

Anyway, it would be tough without a serial number, but if it is the original paint and brand, it will help. Without a serial number or color of paint, it could be really hard to find a good match.