I am writing my own blockchain parser, I wanted to export the UTXOs, I asked around in the bitcoin-dev IRC channel, but my questions got ignored(sort of).

What must I do to verify the blockchain myself? I want to for instance verify that some transaction can actually spend some funds, or that the block in which this transaction is, is not an orphan block and is part of the longest difficulty-wise chain etc.
I was suggested to use "bitcoind", but I am writing my own parser, I want to be able to do these things independently.