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 0xb5a42d45de7d075cd4cbd28da1b2a7ae3204dbbfe02f6108a2df8b8b3f33ed71. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2af27909-1af9-41b1-a12c-6c027d3bde67.json and https://artists.proofprofile.net/proofs/artist/2af27909-1af9-41b1-a12c-6c027d3bde67.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sakk (Chess) Musical - Budapest LIVE 2015