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 0xae9a2d2f3d6c130ba5812d2e57d809b2f658b45e5b143ee7aa3a8ebbb47da53c. Chain 2 (Bitcoin): anchored in block 953963 (2026-06-16T15:12:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27f3c9b8-0fa6-4a4a-96c7-7b42b6b7bb9b.json and https://artists.proofprofile.net/proofs/artist/27f3c9b8-0fa6-4a4a-96c7-7b42b6b7bb9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Soviet Bus Stops (Documentary Soundtrack and Unreleased Recordings), Pt. 1
Soviet Bus Stops (Documentary Soundtrack and Unreleased Recordings), Pt. 2