Built on Open Source

Don't trust. Verify. Here's how.

Every claim we make about your collateral can be checked without asking our permission — on the Bitcoin blockchain, in open-source code, and in a public specification a decade in the making.

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Three claims, three ways to check us.

Don't take our word for any of this — each claim is checkable on-chain, in the math, or in the code.

CLAIM 01 · CHECK IT ON-CHAIN

Your Bitcoin never leaves the chain.

Your collateral is a native Bitcoin DLC on Layer 1 — not an entry in our database. Paste your contract's address into any block explorer and watch it sit there, untouched, for the life of your loan.

See an example DLC funding tx on-chain
mempool.space — tx details
hash: 8a9f42c1…de3b21
output: 2-of-2 taproot · 5.00000000 BTC
confirmations: 4,182
status: Locked · unspent
DLC
LOAN_REPAID · pre-signed
DEFAULT · pre-signed
LIQUIDATION · pre-signed

Every outcome is signed before you lock a single satoshi. Nothing can be improvised later.

CLAIM 02 · CHECK THE MATH

Every outcome is signed before you commit.

Repay, default, or liquidation — all three transactions exist, cryptographically signed, before your BTC moves. Neither Lygos nor the lender can invent a fourth outcome. The rules are enforced by Bitcoin, not by a company's promise.

Check your outcomes with our DLC Verify tool
CLAIM 03 · CHECK THE CODE

The code securing your loan is public.

DLCs were designed in public, specified in public, and implemented in public — the code is here, every line readable. The ones marked Used by Lygos secure your collateral today.

THE DLC SPECIFICATION

One open spec, many interoperable implementations.

Every implementation above targets the same open standard. Started by Nadav Kohen and the Suredbits team in December 2019, the DLC Specification defines how clients interact, how the protocol works, and how signatures are generated — all in the open, all reviewable.

Read the DLC spec

None of this is new. A decade in the making.

2017
DLCs conceived
Dryja's paper: oracle-settled contracts, no new chain.
2019
Mainnet + open spec
First live DLC; Suredbits opens the specification repo.
2020
Adaptor signatures
Fournier's design — simpler, cheaper, more private.
2023
DLCs in production
Atomic Finance ships Bitcoin options on DLCs.
2026
Lygos — real credit
The same open lineage, now securing your loan.

This code didn't appear overnight.

A global community of cryptographers and Bitcoin developers built DLCs in the open over a decade. A few of the people whose work Lygos stands on — see the full contributor list on GitHub.

TDTadge DryjaDLC paper · Lightning co-author
LFLloyd FournierAdaptor-signature DLCs
NKNadav KohenStarted the DLC spec
BCBen CarmanSpec + implementation
BSBen SchrothCreated dlcdevkit + DLCat — Founding Engineer, Lygos
CSChris Stewartbitcoin-s
TLThibaut Le Guillyrust-dlc
ARAntoine RiardBitcoin protocol
JPJesse PosnerAdaptor signatures
MBMatt BlackCo-founder & CTO, Lygos — DLC contributor since 2020
+ dozens more · full list on GitHub ↗

Verifiable Bitcoin credit, built in the open.

Collateral locks on-chain in a DLC you can audit at any moment — starting at 10% APR with $0 origination fees.

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