object/ccp/1 matches the site

public static HumanMadeObject Canterbury_1()
{
    var ccp = new HumanMadeObject()
        .WithContext()
        .WithId("https://linked.art/example/object/ccp/1")
        .WithLabel("Chaucer's Canterbury Pilgrims")
        .WithClassifiedAs(Aat.Print, Aat.TypeOfWork);

    ccp.ProducedBy = new Production().WithLabel("Printing from Plate");
    ccp.ProducedBy.UsedSpecificObject = [
        new HumanMadeObject()
            .WithId("https://linked.art/example/object/ccp-plate")
            .WithLabel("Plate for CCP")
    ];

    return ccp;
}

• Metatype classification The second argument classifies the first, not the object: WithClassifiedAs(Aat.Description, Aat.Statement) says this is a Description, and Description is a kind of Statement. The Plain C# form shows the nesting.

var humanMadeObject = new HumanMadeObject
{
    Context = ["https://linked.art/ns/v1/linked-art.json"],
    Id = "https://linked.art/example/object/ccp/1",
    Label = "Chaucer's Canterbury Pilgrims",
    ProducedBy = new Production
    {
        Label = "Printing from Plate",
        UsedSpecificObject =
        [
            new HumanMadeObject
            {
                Id = "https://linked.art/example/object/ccp-plate",
                Label = "Plate for CCP",
            },
        ],
    },
    ClassifiedAs =
    [
        new Type("http://vocab.getty.edu/aat/300041273", "Print")
        {
            ClassifiedAs = [Aat.TypeOfWork],
        },
    ],
};

Generated from the object the example builds: every property that is set, as object initialisers, with the vocabulary constants where a term is in the registry. The fluent helpers are a convenience, not a requirement; this form and the one as written produce the same JSON.