(registered 2026-06-03, last updated 2026-06-03)

Media type name: application

Media subtype name: vnd.svr.receipt+json

Required parameters: N/A

Optional parameters: version: SVR specification version (default "1.0")

Encoding considerations: binary

Conforms to RFC 8259 (The JavaScript Object Notation Data
Interchange Format).

Security considerations: The media type contains a JSON object with an Ed25519 digital signature. The signature covers the canonical serialization of the receipt content (excluding timing and presentation fields). Consumers MUST verify the signature against a known public key before trusting the receipt content. The receipt does not contain executable code. JSON parsing SHOULD use a strict parser that does not evaluate expressions.

Interoperability considerations: The Signed Verification Receipt (SVR) format is defined by the SVR Specification v1.0.

Published specification: SVR Specification v1.0

https://github.com/Jasonleonardvolk/sigma/blob/main/satya/spec/SVR_SPEC_v1.txt

Applications which use this media: AI verification engines, legal technology platforms, compliance audit systems, financial disclosure analysis tools, healthcare documentation systems, defense source-chain verification, scientific integrity checking, autonomous systems safety verification.

Fragment identifier considerations: NONE

Restrictions on usage: NONE

Additional information:

1. Deprecated alias names for this type: application/vnd.satya.receipt+json
2. Magic number(s): NA
3. File extension(s): .svr.json
4. Macintosh file type code: NA
5. Object Identifiers: NA

General Comments: The Signed Verification Receipt (SVR) is an open standard for cryptographically signed AI verification attestations. Specification, JSON Schema, and open-source verifier libraries (Python, JavaScript, Go) are published at

https://github.com/Jasonleonardvolk/svr-verify

Person to contact for further information:

1. Name: Jason Volk
2. Email: jason&invariant.pro

Intended usage: COMMON

Author/Change controller: Invariant Research