Whitepaper

SCL: A Simple and Efficient Solution for Deterministic Computation using Bitcoin
Paul Dando and Ashif Asharaph. August 2026.

The whitepaper sets out the formal model behind everything in these docs:

• Contracts compile to deterministic bytecode; a 32-byte commitment of that bytecode is embedded in a Bitcoin transaction, and every subsequent call is anchored via a protocol stamp in its own Bitcoin transaction.
• State transitions happen off-chain by replaying payloads against the committed bytecode plus Bitcoin-derived context, with nodes folding write-sets into per-block state roots. There is no consensus ceremony and no global voting.
• Execution is bounded (instruction, stack, and call-depth ceilings), making verification cheap enough for anyone to run.
• Security derives from Bitcoin's consensus, finality, and availability. SCL inherits these properties rather than duplicating them, and extends naturally to instant off-chain asset transfers over the Lightning Network.

MiCA crypto-asset white paper

MiCA Title II Crypto-Asset White Paper: Orobit (XRB) Utility Token on SCL
Dark Fusion Holdings S.A. (offeror and issuer). Prepared for notification to the CSSF, Luxembourg.

The regulatory white paper for the XRB utility token under Regulation (EU) 2023/1114 (MiCA), covering the token's classification, rights and obligations, the offer, and the required risk disclosures.