diff --git a/profile/README.md b/profile/README.md
index ae4b137..911c828 100644
--- a/profile/README.md
+++ b/profile/README.md
@@ -56,6 +56,21 @@ The diagram is a project map, not a deployment diagram. Its status labels are
part of the architecture: public research, published specifications, active
development, and private candidates are intentionally distinguished.
+## Assurance chain
+
+
+
+
+
+
+
+
+The chain reads left to right: machine-checked models, the bounded bridges
+that carry evidence today, and the pinned implementations they are meant to
+land on. The dashed band is the target, full core refinement from models to
+runtime, closed stepwise and published with its evidence; it is a goal
+statement, not a current claim.
+
## Repository portfolio
### Public now
diff --git a/profile/assets/org-assurance-chain-mobile.svg b/profile/assets/org-assurance-chain-mobile.svg
new file mode 100644
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+
+ Oraclizer assurance chain for narrow screens
+ A vertically stacked assurance chain. Mechanized Isabelle/HOL models feed bounded bridges that carry evidence today, and those bridges pin named implementations. A dashed band at the bottom states the target of full core refinement from models to runtime, kept visually separate from the bounded evidence that exists now.
+
+
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+ ORACLIZER ASSURANCE CHAIN
+ Models, bridges, implementations
+ What each layer proves today, and how much is still open
+
+
+
+ MECHANIZED MODELS
+ Isabelle/HOL sessions
+
+
+
+ Cross-domain state preservation
+ preservation morphisms and degrees
+
+
+ Regulatory action composition
+ outcomes, commutativity, normal forms
+
+
+ Protected-behavior obstructions
+ independent partial companion
+
+
+ GKR protocol soundness
+ layered reduction, derived bound
+
+
+ SMT circuit-compiler correctness
+ both directions, all three operations
+
+
+ machine-checked, sorry-free sessions
+
+
+
+
+
+
+ BOUNDED BRIDGES
+ Evidence that exists today
+
+
+
+ Recorded contracts + Creusot replay
+ named Rust functions in five crates
+
+
+ KEVM runtime claims + Certora rules
+ bounded rules, selected bytecode proofs
+
+
+ Deterministic builds
+ frozen source identity, identical hashes
+
+
+ External proof receipt
+ recorded on a public verification chain
+
+
+ each bridge states its exact scope
+
+
+
+
+
+
+ PINNED IMPLEMENTATIONS
+ Where the models are meant to land
+
+
+
+ StateSync-GKR prover
+
+ RUST
+ prover and verification crates
+
+
+ ERC-TRUST reference
+
+ SOLIDITY
+ reference implementation under review
+
+
+ Settlement EVM reference
+
+ FOUNDRY
+ reference design on draft branches
+
+
+ each repository pins its own toolchain
+
+
+
+
+ TARGET
+ Full core refinement, models to runtime, closed stepwise
+ and published with its evidence.
+ The bridges above are bounded today and each states its own scope.
+ This band is the goal, not a current claim.
+
+
diff --git a/profile/assets/org-assurance-chain.svg b/profile/assets/org-assurance-chain.svg
new file mode 100644
index 0000000..2ea42d4
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+++ b/profile/assets/org-assurance-chain.svg
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+
+ Oraclizer assurance chain
+ Three columns read left to right. Mechanized Isabelle/HOL models feed bounded bridges that carry evidence today, and those bridges pin named implementations. A dashed band across the bottom states the target of full core refinement from models to runtime, distinguished from the bounded evidence that exists now.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ ORACLIZER ASSURANCE CHAIN
+ From mechanized models to pinned implementations
+ What each layer proves today, and how much of the chain is still open
+
+
+
+
+
+
+
+
+ MECHANIZED MODELS
+ Isabelle/HOL sessions
+
+
+
+ Cross-domain state preservation
+ preservation morphisms and degrees
+
+
+ Regulatory action composition
+ outcomes, commutativity, normal forms
+
+
+ Protected-behavior obstructions
+ independent partial companion
+
+
+ GKR protocol soundness
+ layered reduction, derived bound
+
+
+ SMT circuit-compiler correctness
+ both directions, all three operations
+
+
+ machine-checked, sorry-free sessions
+
+
+
+ BOUNDED BRIDGES
+ Evidence that exists today
+
+
+
+ Recorded contracts + Creusot replay
+ named Rust functions in five crates
+
+
+ KEVM runtime claims + Certora rules
+ bounded rules, selected bytecode proofs
+
+
+ Deterministic builds
+ frozen source identity, identical hashes
+
+
+ External proof receipt
+ recorded on a public verification chain
+
+
+ each bridge states its exact scope
+
+
+
+ PINNED IMPLEMENTATIONS
+ Where the models are meant to land
+
+
+
+ StateSync-GKR prover
+
+ RUST
+ prover and verification crates
+
+
+ ERC-TRUST reference
+
+ SOLIDITY
+ reference implementation under review
+
+
+ Settlement EVM reference
+
+ FOUNDRY
+ reference design on draft branches
+
+
+ each repository pins its own toolchain
+
+
+
+
+
+
+
+ TARGET
+ Full core refinement, models to runtime, closed stepwise and published with its evidence.
+ The bridges above are bounded today and each states its own scope. This band is the goal, not a current claim.
+
+