šŸ›”ļø
BTCB2 Pool
šŸš€ Launch Promo: 0.25% Pool Fee
šŸ‡ŗšŸ‡ø Region: US East (North America)
šŸ“– API Docs →
BTCB2: LIVE (0.25% Fee | PPLNS-8D)
Siacoin: Sia-ASIC Compatible (Native SC on Roadmap)

BTCB2 & Siacoin Pool

Native Sia-compatible Stratum V1 for BM-S3, BM-S3+, S11, A3, SC1 & GPU/CPU rigs mining Bitcoin BLAKE2b.

Current Fee
0.25%
Reward Method
PPLNS-8D

Mining Connection Endpoint

Region: US East (Philadelphia Metro / FiOS Fiber)
Primary Stratum Endpoint US East Regional • Port 23339
Stock Sia-Stratum V1 ASIC Compatible
stratum+tcp://us-east.stratum.sentineldefensetechnologies.co.za:23339
Ultra-low latency fiber path for North American and global miners. Capacity: 128 max sessions.
Miner Worker Username Format:
YOUR_BTCB2_PAYOUT_ADDRESS.WorkerName
Password: x
No account required. Rewards credit directly to your address.
Why Mine with Sentinel BTCB2 Pool
1. 0.25% Launch Fee
Published transparent fee schedule permanently capped at 1.00% maximum.
2. Work-Weighted PPLNS-8D
Weights shares by true hash work (W = Diff Ɨ 2Ā³Ā²) over 8 difficulties, eliminating high-diff ASIC penalties.
3. Zero Registration
Mine directly to any Bech32 Bitcoin address. Zero accounts, passwords, or custodial holding.
4. Stock ASIC Firmware
100% native Sia-Stratum compatibility with stock factory firmware for BM-S3, S11, A3, SC1.
5. Provable Key Isolation
Zero private keys on Internet-facing pool hosts. Block rewards are split directly in coinbase templates.

Live Pool Telemetry

Auto-refreshing every 5s
Pool Hashrate
--
10-min rolling accepted work
Active Workers
--
-- open connections
Network Block Height
--
-- BTC Reward
Network Difficulty
--
-- blocks to retarget

Miner Self-Service Dashboard

v1.0 API

Accountless telemetry, deterministic payout conditions, and client-side privacy protection.

āš” Hardware Compatibility & Configuration Stratum V1 / BLAKE2b

Live hardware class verification matrix and single-active setup drawer.

CPU & GPU Verified • FPGA & ASIC In Qual
šŸ’» CPU Mining VERIFIED
Target: AMD Ryzen / Intel AVX2
Client: supryolo v0.2.1
24/7 public WAN heartbeat; 100% share acceptance, 0 rejects.
Vardiff: 1 Configure →
šŸŽ® GPU Mining VERIFIED
Target: NVIDIA RTX / AMD OpenCL
Client: supryolo CUDA v5
2.29 GH/s benchmarked; 50/50 accepted shares, 0 stale.
2.29 GH/s @ 72W Configure →
āš” FPGA Bitstream COMPATIBLE
Target: Xilinx / Agilex / Spartan
Spec: Stratum V1 Contract
Hardware wire protocol published; testbench open.
Unverified Bench View Spec →
šŸ­ ASIC Mining IN QUAL
Models: BM-S3, S11, A3, SC1
Firmware: 100% Stock Factory
Wire-compatible Sia Stratum; vardiff up to 131k.
550Gā€“19T Vardiff Configure →

CPU Mining Setup Verified Live

Lightweight background mining for Linux, Windows, and macOS (AMD Ryzen / Intel Core AVX2).

Client: supryolo v0.2.1 / btcb2-miner
Linux / Windows Terminal Command: 
./supryolo --url stratum+tcp://us-east.stratum.sentineldefensetechnologies.co.za:23339 --user YOUR_BTCB2_PAYOUT_ADDRESS.CpuRig1 --no-gpu --cpu-threads 0
Core & Thread Tuning
Set --cpu-threads 0 for all physical cores, or limit cores to preserve host CPU headroom.
Low-Power Background Mode
Run with nice -n 19 on Linux for uninterrupted background operation alongside other workloads.
Direct Bech32 Payouts
Replace YOUR_BTCB2_PAYOUT_ADDRESS with your native SegWit address. Zero account needed.

Pool Specifications & Policy

Click to expand details
šŸ“Š Transparent Fee Policy (0.25% Active Launch Promo)
ā–¼

No hidden fees, no silent changes. Pool fees are hardcoded into block coinbase templates and auditable on-chain.

30-Day Unique Miners Pool Fee Status
0 ā€“ 24 Unique Miners 0.25% (25 bps) CURRENT ACTIVE TIER
25 ā€“ 99 Unique Miners 0.50% (50 bps) Upcoming
100 ā€“ 249 Unique Miners 0.75% (75 bps) Upcoming
250+ Unique Miners 1.00% (100 bps) Long-term Cap

ā€¢ Anti-Gaming Rule: Tiers count unique payout wallet addresses, never worker names or connection counts.

ā€¢ 14-Day Advance Notice: Any fee adjustment requires sustaining the threshold for 30 consecutive days and a mandatory 14-day advance notice.

āš–ļø Why Work-Weighted PPLNS-8D Matters for ASICs
ā–¼

Traditional pools count raw share rows equally. This penalizes high-difficulty ASICs: submitting 1 share at diff 131,072 represents the same expected work as 128 shares at diff 1,024.

Work_j = Difficulty_j × 2^32

Our pool calculates reward shares strictly proportional to total expected hashes performed across the last 8 network difficulties of accepted work.

Coinbase rewards are split directly inside the block transaction (up to 512 outputs). Balances under the 546-sat dust limit roll up into the persistent owed ledger for subsequent block payouts.

ā“ Frequently Asked Questions
ā–¼

Do I need custom firmware for BM-S3?

No. Standard factory stock firmware is 100% supported. The gateway automatically adapts the BTCB2 work header to what the ASIC expects.

When do mining rewards mature?

Per Bitcoin consensus rules, coinbase transactions require 100 block confirmations before funds become spendable on-chain.

What is the minimum payout threshold?

Minimum payout per block is 546 satoshis (standard Bitcoin dust limit). Sub-546 balances roll into the owed ledger for the next pool block.

Is this pool protected against block withholding?

Yes. Built on the DATUM protocol with anti-block-withholding assignment slots to protect all honest miners.