Each key is used to sign a message to validate my ownership of it. Use OpenTimestamps to verify timestamps for each signature.
74F8 4E87 E83E 6BC7 69F1 752C 7C3A 73BE F044 CAEF
2DC7 3D06 F2D3 3A89 4F5E 96C1 5D9F 6033 EDDD 62B2