Demian Koopman
| Demian Koopman VERIFIED | |
| Blue belt VERIFIED | |
| 0 year(s) and 6 month(s) of training | |
| May 19, 1989 (age 36) | |
| Nieuwveen, Netherlands | |
| UNDERHOOK SOCIETY VERIFIED | |
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Achievements
| Profile manually reviewed & certificate issued | |
| Current rank verified by promoting instructor | |
| Name verified by credit card | |
| 10 verifications received | |
| 25 verifications received | |
| 50 verifications received | |
| Trained for 5 years | |
| Trained for 10 years | |
| Trained for 15 years | |
| Trained for 20 years | |
| Won 5 gold medals | |
| Won 10 gold medals | |
| Won 25 gold medals | |
| 10 competition matches | |
| 50 competition matches | |
| 100 competition matches | |
| 500 forum posts | |
| 1,000 forum posts |
Blue belt verification progress
Profile filled out Promotion history filled out Identity Confirmed 310/200 vote points
100%
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Promotion history
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March 5, 2026 - Lisse
0 year(s) 0 month(s) 16 day(s)
Promoted by: Iwan Hansen
September 15, 2025 - Lisse
0 year(s) 5 month(s) 18 day(s)
Stripe 1: May 29, 2025
Stripe 2: May 29, 2025
Stripe 3: October 9, 2025
Stripe 4: November 27, 2025
Stripe 2: May 29, 2025
Stripe 3: October 9, 2025
Stripe 4: November 27, 2025
Votes received for current rank
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