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 0x6406b5c729066ee18652e926d72083b48dea0850472b766175333ed172d66a14. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4da5545-92ec-45e5-8597-aa12064c6d94.json and https://artists.proofprofile.net/proofs/artist/d4da5545-92ec-45e5-8597-aa12064c6d94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Heart Shaped Box (Ambient Piano Version)
The Last Of Us Main Theme (Ambient Version)