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 0x53dbfb70c233ec8584c1094294586da73a807650f20d3fce3de3e8016ce45d50. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb843bd7-e5e7-4bb0-ab10-563dc80ae4d8.json and https://artists.proofprofile.net/proofs/artist/eb843bd7-e5e7-4bb0-ab10-563dc80ae4d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Graveyard 2: Songs That Didn't Make the Album
The Graveyard 3: Songs That Didn't Make the Album