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 0x1d925b8d7465ed0fd3ca6f1406e868a40f1cf7d05ecd5f86e500c4e6f59fd3c4. 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/68dd748d-4e4a-42f9-8001-3311717c2ba1.json and https://artists.proofprofile.net/proofs/artist/68dd748d-4e4a-42f9-8001-3311717c2ba1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Big Issue Pt. 2 (Original Television Soundtrack)