Groundmark easyDNS Technologies Inc. This document defines the Groundmark attestation framework and the profile of Identity Service Providers (IDSPs) that issue Groundmark attestations. It is the companion document to the Groundmark core protocol, which specifies DNS publication and request-signature mechanics. This document specifies the role and obligations of Identity Service Providers, a four-level taxonomy of attestation strength, an initial vocabulary of claim types, the JSON schema and signature construction for attestation payloads, the method- disclosure discipline that defines an IDSP's accountability obligation, and revocation semantics for the attestation layer. The core protocol document defines the discovery mechanisms (the _agentclaim DNS TXT record and the HTTP retrieval of attestation payloads) on which this document depends. Together the two documents specify Groundmark.