"I ve just been told I was the first man to score a century in both first-class innings at Headingley", Hope said on BBC Radio s Test Match Special.
The West Indies have beaten England in an away Test match for the first time in 17 years.
Despite his side's struggles in the longest format in recent years, Holder believed such performances were always within West Indies capabilities, and hailed the victory as just rewards for some previously unheralded toil.
SCORES: England 258 all out & 490 for 8 declared. But after resuming on five without loss, Windies scored more than 300 runs on the last day at Root's Yorkshire home ground.
Stuart Broad had a hand in both wickets to fall on the final morning at Headingley - literally in the case of a freaky run out of Kyle Hope - but Kraigg Brathwaite escaped two dropped catches to continue his outstanding match. We would have had a tiresome day with only one side going for a win.
Windies resumed on 5-0, needing another 317, and enjoyed an early reprieve when Alastair Cook dropped Brathwaite on four at slip off Stuart Broad - England's fourth missed chance of the Test and the 11th overall.
After tea, Roston Chase (30) was brilliantly caught by diving substitute fielder Mason Crane at mid-on.
Estwick said by then, the workload had begun to take its toll especially on the Windies seamers and there was little to give as they searched for the important breakthrough.
Nobody had ever made a century in both innings of a first-class match here at Headingley.
Hope came highly-recommended from the Caribbean - although an average of 18.61 prior to this Test is hardly a ringing endorsement.
They ultimately took the game away from the West Indians after tea on the fourth day.
The opener pressed on to register his fifty off 98 balls with seven fours, Shai Hope reaching the same milestone in 28 few balls as England's frustration grew. Jermaine Blackwood, on the other hand, wanted to win in the grand manner, shed off his helmet in an act of defiance and charged down the pitch.
Even though Blackwood was stumped by Jonny Bairstow off the bowling of Moeen, Hope hit the winning runs the very next over and finished unbeaten on 118 off 211 deliveries, which included 14 boundaries.
The series concludes with the third Test at Lord's starting on September 7.