I think this coin is broken... I'm seeing this in my pool logs.
[2017-09-20 16:22:11.079] [DEBUG] [default] - Pool brazilcoin Thread 2 We thought a block was found but it was rejected by the daemon, share data: {"job":"24","ip":"***Hidden***","port":10024,"worker":"***Hidden***","height":2480,"blockReward":50000000000,"difficulty":48.16155021,"shareDiff":"276.74301122","blockDiff":245.381228884,"blockDiffActual":245.381228884,"coinbaseBuffer":[1,0,0,0,161,149,194,89,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,75,2,176,9,4,161,149,194,89,8,250,190,109,109,79,86,122,109,83,113,101,89,110,47,13,0,0,0,89,1,0,0,8,0,0,0,0,79,51,119,89,49,121,113,113,48,1,0,0,0,0,0,0,0,96,0,0,1,66,24,0,0,13,47,110,111,100,101,83,116,114,97,116,117,109,47,0,0,0,0,2,0,69,211,74,11,0,0,0,35,33,2,50,138,194,187,49,88,244,167,234,134,240,132,89,202,194,152,254,119,115,165,134,34,62,73,29,69,240,180,164,213,23,118,172,0,47,104,89,0,0,0,0,25,118,169,20,27,87,151,180,104,161,95,128,234,190,247,190,154,112,133,93,177,225,233,202,136,172,0,0,0,0],"headerHash":[0,211,120,25,70,20,25,58,113,111,129,159,54,248,168,72,155,193,219,179,171,98,27,204,226,206,236,0,0,0,0,0],"blockBigNum":{},"blockHash":"0000000000eccee2cc1b62abb3dbc19b48a8f8369f816f713a1914461978d300","blockHashInvalid":"0000000000eccee2cc1b62abb3dbc19b48a8f8369f816f713a1914461978d300","time":1505924530}