Is there a lawyer in the house?
I'm not a lawyer so I posed the original question to Amos.
The response I received from the Rights and Permissions Manager at Amos was that as long as raywrio doesn't intend to sell or distribute the album pages he creates, he can use the Scott numbers and will not be infringing on Scott's copyright.
EDIT: Here is the response along with contact information should further questions arise.
Thanks for your inquiry regarding the use of Scott numbers in your personal stamp album. As long as you do not intend to sell or distribute the album pages you create, you can use the Scott numbers. You will not be infringing on Scott's copyright by using the numbers for your personal use.
When the Scott numbers are used in a commercial product that competes with our own products, Scott is entitled to compensation, usually in the form of a license fee. The copyright notice simply serves as a reminder to individuals and companies that the Scott numbers are our intellectual property and one needs to request permission to use them.
I hope this answers your question.
Rights & Permissions Manager
Amos Hobby Publishing
911 S. Vandemark Rd.
Sidney, OH email@example.com