@Invis

The 10-15 seconds you mention is spooky near by the delay after which blocks arrive at my local node daemon.

I've tried to modify my pool to compare mined blocks against official explorer list. That worked stable but is also incorrect.
Block on height 84404 has same hash in my pool and in explorer list. One can assume, origin of block is my pool. Due to my changed this block get unlocked and *not* marked as orphaned. But looking in my pool wallet, I can see, that the reward for this block was cancelled. Don't know why. But I'm getting more crazy. I'm spending money on blocks that are orphaned really, even if official block list claims not.

Same with block 84430 and 84431, where both are contained in official list but only 84430 is accepted by network. To summarize: I think one can trust on accepted blocks by network and do NOT trust block list on official coin website.