Spec link updates (#64)

* Update specs and references
Signed-off-by: steve lasker <stevenlasker@hotmail.com>

scitt-specs.md

@@ -14,13 +14,9 @@ The following specifications are part of, or related to the IETF SCITT working g
 - SCITT Architecture
   - [IETF datatracker](https://datatracker.ietf.org/doc/draft-ietf-scitt-architecture/){:target="_blank"}
   - [GitHub Repo](https://github.com/ietf-wg-scitt/draft-ietf-scitt-architecture){:target="_blank"}
-- SCITT Receipts
-  - [IETF datatracker](https://datatracker.ietf.org/doc/draft-birkholz-scitt-receipts/){:target="_blank"}
-  - [GitHub Repo](https://github.com/ietf-scitt/draft-birkholz-scitt-receipts){:target="_blank"}
 - SCITT Reference APIs (SCRAPI)
+  - [IETF datatracker](https://datatracker.ietf.org/doc/draft-ietf-scitt-scrapi/){:target="_blank"}
   - [GitHub Repo](https://github.com/ietf-wg-scitt/draft-ietf-scitt-scrapi){:target="_blank"}
-- SCITT COSE Hash Envelope
-  - [GitHub Repo](https://github.com/OR13/draft-steele-cose-hash-envelope){:target="_blank"}
 
 ## SCITT Community Projects
 
@@ -33,12 +29,17 @@ The following specifications are part of, or related to the IETF SCITT working g
 
 ## SCITT Related Specifications
 
-- [IETF: COSE Specification][cose-spec]{:target="_blank"}
-- [IETF: RATS][rats]{:target="_blank"}
-- [IETF: CBOR Web Token (CWT) Claims in COSE Headers](https://datatracker.ietf.org/doc/draft-ietf-cose-cwt-claims-in-headers/){:target="_blank"}
-  - [GitHub Repo](https://github.com/tplooker/draft-ietf-cose-cwt-claims-in-headers){:target="_blank"}
-- [OCI: Distribution][oci-distribution-spec]{:target="_blank"}
-
-[cose-spec]:               https://datatracker.ietf.org/doc/html/rfc8152
-[oci-distribution-spec]:   https://github.com/opencontainers/distribution-spec
-[rats]:                    https://datatracker.ietf.org/wg/rats/documents/
+- [IETF: COSE](https://datatracker.ietf.org/doc/html/rfc8152){:target="_blank"}
+  - COSE Hash Envelope
+    - [IETF datatracker](https://datatracker.ietf.org/doc/draft-steele-cose-hash-envelope/){:target="_blank"}
+    - [GitHub Repo](https://github.com/OR13/draft-steele-cose-hash-envelope){:target="_blank"}
+  - COSE Receipts
+    - [IETF datatracker](https://datatracker.ietf.org/doc/draft-ietf-cose-merkle-tree-proofs/){:target="_blank"}
+    - [GitHub Repo](https://github.com/cose-wg/draft-ietf-cose-merkle-tree-proofs){:target="_blank"}
+  - CBOR Web Token (CWT) Claims in COSE Headers
+    - [IETF datatracker](https://datatracker.ietf.org/doc/draft-ietf-cose-cwt-claims-in-headers/){:target="_blank"}
+    - [GitHub Repo](https://github.com/tplooker/draft-ietf-cose-cwt-claims-in-headers){:target="_blank"}
+- [IETF: RATS](https://datatracker.ietf.org/wg/rats/documents/){:target="_blank"}
+- [OCI](https://github.com/opencontainers/){:target="_blank"}
+  - [OCI Artifacts](https://github.com/opencontainers/artifacts/){:target="_blank"}
+  - [OCI: Distribution](https://github.com/opencontainers/distribution-spec){:target="_blank"}