SVR stands for Signed Verification Receipt. An SVR receipt is a cryptographically signed record of what an AI system checked before an output was used. It can bind source hashes, input hashes, verifier version, constraints, result, timestamp, and public key into an auditable artifact. The receipt does not claim that an output is universally true. It records the verification work performed against specific evidence and rules.
When AI-generated output becomes legal evidence, compliance documentation, scientific data, or an agent action, the question is not just "what did the AI say?" The question is: what was checked before anyone relied on it? A confidence score does not answer that question. A human-review policy does not answer it. A chat log does not answer it.
An SVR receipt answers it. It records the specific sources that were checked, the specific constraints that were evaluated, the specific result of the verification, and binds all of that to a cryptographic signature that any third party can verify independently.
The SVR media type is registered with IANA (the Internet Assigned Numbers Authority). This registration means any system that encounters an SVR receipt can identify its format unambiguously. It is not a proprietary blob; it is a recognized data type in the global internet standards infrastructure.
The registration covers the JSON serialization of SVR receipts. The format is designed to be machine-readable, human-inspectable, and independently verifiable without requiring any Invariant Research software or infrastructure.
An SVR receipt records verification work performed against specific source evidence and explicit constraints. It does not assert that the underlying sources are correct, that the constraints are complete, or that the output will be valid in every context. This distinction matters in regulated environments. Auditors, regulators, and courts need to know exactly what was verified and what was not.
This honesty is a trust signal, not a weakness. Overclaiming is what undermines confidence in AI verification. SVR receipts are precise about their scope because precision is what makes them useful as audit artifacts.
View sample verification receipts, or generate your own by verifying a claim, citation, or document.