Exactly four weeks since bitcoin split into bitcoin and bitcoin cash, the original digital currency hit a record high Tuesday while the offshoot fell to its lowest in more than a week.Bitcoin rose more than 6.5 percent, to a record high of $4,703.42, up nearly 70 percent for the month, according to CoinDesk. Bitcoin edged off that high in afternoon trade, hovering around $4,603, still more than quadruple in value for the year and up about 60 percent for August.Bitcoin cash hit a low of $559.61, its lowest since Aug. 18, before recovering to around $575, according to CoinMarketCap. The alternative version of bitcoin, supported by a minority of developers, is still up about 170 percent from a low of $210 hit on Aug. 1, the day of the split