Well, the OCS stamps have the Token ID 149.500 - 149.999, the ones with paper wallet have the Token ID 0 - 149.499.

Once you know the Token ID, it helps a lot.

If it is between 0 - 149.499 and the scratch layers are intact, you are sure the digital asset still is attached.

How to find out what Token ID you have...

Scan the QR code or enter the "Code [1]" at https://crypto.post.at/asset

When you see:

TRANSFERIEREN SIE IHRE CRYPTO STAMP:
Diese Crypto stamp wurde mit einem Paper-Wallet gekauft.

Then know it is one of the 149.500 with a paper wallet, if it is unscratched, you're fine!

When you're on that page, Right-click (or tap with with 2 fingers (mac)) on any page element and select Inspect Element.
Then search for "Elements", "Console", "Sources",...

Choose "Console" and you will you will find between the text:

Edition: 1    Asset: ... (between brackets is the Token ID!)

Now you have the Token ID!

If you have an OCS stamp, you can place the Token ID instead of the "0"

https://crypto.post.at/CS1/meta/0

For example:

A stamp has the Asset code: 39YLhW

>>> https://crypto.post.at/CS1/39YLhW

I see in the "Console"

>>> Edition: 1    Asset: 39YLhW (74097)

Then
>>> https://crypto.post.at/CS1/meta/74097

And this is visible:

{"description":"Crypto stamp Edition 1 (CS1), ID 39YLhW",
"home_url":"https://crypto.post.at/CS1/39YLhW",
"image_url":"https://crypto.post.at/CS1/image/GREEN",
"name":"Crypto stamp 39YLhW",
"properties":[{"key":"shop_status","type":"string","value":"None"},
{"key":"deliverable","type":"integer","value":0},
{"key":"color","type":"string","value":"green"}],"tags":[]}

"shop_status" "None" = NOT OCS

Other example:
An UNSOLD OCS:

3RrbDN

>>> https://crypto.post.at/CS1/3RrbDN
>>> Edition: 1    Asset: 3RrbDN (149501)
>>> https://crypto.post.at/CS1/meta/149501

{"description":"Crypto stamp Edition 1 (CS1), ID 3RrbDN",
"home_url":"https://crypto.post.at/CS1/3RrbDN",
"image_url":"https://crypto.post.at/CS1/image/GREEN",
"name":"Crypto stamp 3RrbDN",
"properties":[{"key":"shop_status","type":"string","value":"Initial"},
{"key":"deliverable","type":"integer","value":0},
{"key":"color","type":"string","value":"green"}],"tags":[]}

"shop_status" "Initial" = OCS Stamp, unsold

Other example:
A SOLD OCS, unshipped:

6KPCCF

>>> https://crypto.post.at/CS1/6KPCCF
>>> Edition: 1    Asset: 6KPCCF (149960)
>>> https://crypto.post.at/CS1/meta/149960

{"description":"Crypto stamp Edition 1 (CS1), ID 6KPCCF",
"home_url":"https://crypto.post.at/CS1/6KPCCF",
"image_url":"https://crypto.post.at/CS1/image/GREEN",
"name":"Crypto stamp 6KPCCF",
"properties":[{"key":"shop_status","type":"string","value":"Sold"},
{"key":"deliverable","type":"integer","value":1},
{"key":"color","type":"string","value":"green"}],"tags":[]}

"shop_status" "Sold" = OCS sold
"deliverable" "1" = unshipped

Other example:
A SOLD OCS, shipped (to me ):

71Qrnr

>>> https://crypto.post.at/CS1/71Qrnr
>>> Edition: 1    Asset: 71Qrnr (149919)
>>> https://crypto.post.at/CS1/meta/149919

{"description":"Crypto stamp Edition 1 (CS1), ID 71Qrnr",
"home_url":"https://crypto.post.at/CS1/71Qrnr",
"image_url":"https://crypto.post.at/CS1/image/GREEN",
"name":"Crypto stamp 71Qrnr",
"properties":[{"key":"shop_status","type":"string","value":"ShippingSubmitted"},
{"key":"deliverable","type":"integer","value":0},
{"key":"color","type":"string","value":"green"}],"tags":[]}

"shop_status" "ShippingSubmitted" &
"deliverable" "0" = OCS sold & shipped

Hope this helps...

(By strange chance I seem to have picked all GREEN ones )