From seeds to the result
- Enter the revealed server seed, client seed and exact nonce for the completed bet. The hashed active seed cannot reproduce an outcome.
- The official scheme computes HMAC-SHA512 with the server seed as a UTF-8 key and
clientSeed:nonceas its message. It uses one 64-byte block, without a round suffix. - Each four-byte group becomes a fraction between 0 and 1. A value strictly greater than 0.5 means right; all other values mean left.
- The number of right turns gives the zero-based slot. The selected Classic table supplies the multiplier.
- Enter a server seed hash saved before play to compare the revealed seed with that commitment.
Evidence and limits
Four captured 12-row Regular/Classic rounds, with nonces 0-3, matched the full paths, slots and payouts. The complete server seed hash and client seed were recorded at 12:25:03 UTC on October 20, 2026, before the first captured bet at 12:25:24 UTC. After rotation, the disclosed seed matched that saved hash. This evidence supports Verified status for this Classic replay adapter.
Seven additional captured outcomes matched with 11, 13 or 16 rows and High risk. Their commitment provenance is weaker and is documented separately in the test vectors; they are not treated as pre-bet evidence. Verified describes our replay checks for the named adapter, not a casino endorsement, proof of real-money settlement or verification of every operator game.
The payout snapshot covers 27 normal Classic configurations: 8-16 rows with Regular, High or Nightmare risk. These are BC.Game’s labels. Lightning, Left and Right side bias, and legacy payout tables are excluded. Choose the exact mode and version recorded for your bet; older bets may have used different tables.
See what provably fair checks can establish, calculate this table’s RTP or simulate its distribution.
Sources and reproducible tests
- BC.Game’s official Plinko verifier source.
- Classic payout tables from captured game initialization data, observed October 20, 2026. This date is our observation, not an operator release date.
- Engine test vectors and provenance.
| Stage | Compare | Limit |
|---|---|---|
| Commitment | Revealed seed against your previously saved hash. | A hash created after disclosure is not a saved pre-bet commitment. |
| Outcome | Reproduced path and slot under adapter v1. | Only the documented mode and input format are covered. |
| Payout | The recorded multiplier against the applicable captured table. | A snapshot lookup is not confirmation of real-money settlement. |