1
Open a Box
Browse our curated collection of boxes
FAIRNESS
Provably Fair Verification
Independently verify your game results. Enter the proof data from your game to re-derive the winning item.
2
Click Provably Fair
Click the Provably Fair button on your item
3
Verify your results
Verify your results with pre-filled game data
Verification Result
Standby (Awaiting verification)
Winning Item
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Value
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Rarity
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Probability
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HMAC-SHA512 Result
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Ticket Number
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Game Snapshot
Total Items in Snapshot: 0
Item
Rarity
Value
Probability
Awaiting verification to load snapshot rows
FAIRNESS
How Provably Fair Works
1
Before your game, we show you a SHA-256 hash of the server seed (commitment)
2
Game outcomes are generated using the server seed, your client seed, your salt, and a nonce
3
We calculate HMAC-SHA512 to get a deterministic result
4
The result is converted to a ticket number (0-999,999) using rejection sampling
5
The ticket maps to an item based on probability ranges from the game snapshot
6
After seed rotation, you can verify SHA-256 (server_seed) = committed hash
Cravin is retail e-commerce
Cravin is retail e-commerce, operating under MCC 799. Our model has been legally reviewed across 46 US States.