1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0be4b32d8aa21ba1213dc640dd3072b789048a7a10472da54250df92c264a73. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68fb2614-603e-4fb4-b831-c66fa83b8c92.json and https://artists.proofprofile.net/proofs/artist/68fb2614-603e-4fb4-b831-c66fa83b8c92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Polkas: Margaret Fagan's 50th Birthday / Cheese Fairy
When You Were Born / Rawling's March / March to Prague