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 0x4d1532f1ada1a398e4ce530a519cbb3c5f5aad2ee3ed508382519fbe1bfb0872. 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/61c8d3b0-1ed8-4e6f-8b35-eef05e7de124.json and https://artists.proofprofile.net/proofs/artist/61c8d3b0-1ed8-4e6f-8b35-eef05e7de124.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bachiana Española (Based On Prelude BWV 1006a)