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 0x20fbbbda4e2ce698936dd1e54263d1c75341d1cd23856b54cdde24f901445a3b. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6be3767-fc2d-4fe1-8a9f-a727547c8f34.json and https://artists.proofprofile.net/proofs/artist/a6be3767-fc2d-4fe1-8a9f-a727547c8f34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Layers of Pain (Live at le Stock/Fernando Rock Show)