thumb|right|alt=The back view of a long sleeved kimono decorated with a large tree and flowers on a black, yellow and wave-patterned background.|Kimono for a young woman, depicting a boat on swirling
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 0x220f830c0ae32d4562398ea8b65e8298c7c964665bf658ba7b5a52fb266624fb. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72de56b1-7bf7-4014-8e1b-0123ef70aa21.json and https://artists.proofprofile.net/proofs/artist/72de56b1-7bf7-4014-8e1b-0123ef70aa21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).