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 0x706068ad2baee02a3aab2b4a4fbd349498bc7a7f389e961ad4656b6a69658ff2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c50247b6-fc77-45a8-8009-dc5bdba1a681.json and https://artists.proofprofile.net/proofs/artist/c50247b6-fc77-45a8-8009-dc5bdba1a681.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
LittleBigPlanet (Original Game Soundtrack)
Tearaway (Original Game Soundtrack - Bonus Edition)
Tearaway Unfolded (Original Video Game Soundtrack)
Astro's Playroom (Original Video Game Soundtrack)