My two cents
It's usually pretty hard to find real-world examples of Service Blueprints as these contain the recipe to create excellent services and experiences. But here a few examples that are publicly visible online.
Service Blueprints collections
Marc Fonteijn collected in 2010 twelve examples of Service Blueprints in this slideshare.
Yiti Wang collected on Pinterest 36 examples of Service BlueprintsStill, on Pinterest, 龙易 collected 157 examples of Service Blueprints.
The community website Service Design Tools shows two examples of Service Blueprints.
The Living Guide to Social Innovation Labs by MaRS Solutions Lab shows well that a Service Blueprint can be used to show a service's actual or future state with three examples.
Lauren Oswald has written on the CX Lead community where she collected and commented on 3 Service Blueprints examples from big brands: one from Airbnb, one from Starbucks and one from Spotify.
Service Blueprints from Portfolio
Service Designer portfolios are a good source for Service Blueprints. Here a few that can be inspiring:
Service Blueprints on Behance (N.B. Behance is a place where many visual designers have their portfolios)