Prove
All Portfolios

Sports

Make your best results official.

Problem: A result nobody saw is just a number.

Fix: A coach, teammate or official app confirms it.

What you'll prove

Who is it for?

Athletes who want their best times, lifts and ratings on record.

What does it cost?

Paths, proofs and checks are free. The Arena adds a team and weekly challenges for $12 a month. Join the Arena

Who confirms my work?

A coach, teammate or judge who saw it. Chess and other ratings come from the app.

Who sees it?

You choose. Adults can share a public link. Work by anyone under 18 is always private.

LiveProof-of-Work · Oct–Nov: every verified proof counts. 16 days left
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Reach 3.0 Tennis Rating

3 milestones · 20 weeks

Improve from beginner to a 3.0 USTA competitive rating.

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Train for and Run a Trail Race

3 milestones · 16 weeks

Complete a 25km trail race over technical terrain.

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Squat 315 lbs / 142 kg

3 milestones · 20 weeks

Build strength to three plates on the barbell squat.

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Do 100 Consecutive Pushups

3 milestones · 10 weeks

Build to 100 unbroken pushups in a single set.

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Cycle 100 Miles (Century Ride)

3 milestones · 14 weeks

Complete a 100-mile cycling event.

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Intermediate Rock Climbing Grade (IRCRA-Verified)

3 milestones · 14 weeks

Go from beginner to leading 5.10 routes outdoors.

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Complete a 70.3 Half-Ironman

3 milestones · 24 weeks

Train for and finish a 70.3 mile triathlon.

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Compete in Martial Arts

3 milestones · 16 weeks

Enter and compete in an amateur martial arts competition.

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Earn a Black Belt

3 milestones · 260 weeks

Train consistently in a martial art to earn a black belt from a certified instructor.

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Complete the CrossFit Open

3 milestones · 5 weeks

Complete all five CrossFit Open workouts and submit official scores.

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Row 1000m Under 3:30

3 milestones · 12 weeks

Achieve a sub-3:30 1000m rowing ergometer time. Screenshot of Concept2 logbook required.

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Reach Intermediate Surfing Level

3 milestones · 20 weeks

Consistently ride unbroken green waves, execute basic turns, and duck-dive under breaking waves.

People and recorded checks confirm the work here. Powstik does not give degrees or licences.