certificateSecret
Specify the name or ARN of the AWS Secrets Manager secret that contains your C2PA public certificate chain in PEM format. Provide a valid secret name or ARN. Note that your MediaConvert service role must allow access to this secret. The public certificate chain is added to the COSE header (x5chain) for signature validation. Include the signer's certificate and all intermediate certificates. Do not include the root certificate. For details on COSE, see: https://opensource.contentauthenticity.org/docs/manifest/signing-manifests