thumb|right|A soul house Soul houses were pottery offering trays often moulded to include a model of a house that are associated with tombs dating from the Middle Kingdom of Egypt. Designs range from
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522e72867bcac4ce514b6bb32b9714cc8f97cbf3819260d4cd80b23a861c3770. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cefe65c-3846-4238-9936-147d7f2e2908.json and https://artists.proofprofile.net/proofs/artist/3cefe65c-3846-4238-9936-147d7f2e2908.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).