fix: self-anchoring proof storage and validation fixes #260

Job	Run time
Check ceramic-one	6m 23s
Generate Integration Test Matrix	6s
Check hermetic-driver	47s
Build hermetic-driver	57s
Unit Test ceramic-one	17m 34s
Build ceramic-one	21m 17s
Publish Integration Test Suite	6m 18s
Run Integration Tests (basic-rust)	7m 54s
Hermetic Test Results	3s
	1h 1m 19s

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