John Baldwin Gourley (born June 12, 1981) is an American musician, singer, and songwriter from Alaska. He is the founder, lead singer and rhythm guitarist of the rock band Portugal. The Man, with the
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 0xef52a0e3eb93df903dad2d56cd9f50d1fe184c6824d45fe8ee7cdbd454eed936. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d873be0-c3b0-48c1-a11f-8c8beb61d2d6.json and https://artists.proofprofile.net/proofs/artist/8d873be0-c3b0-48c1-a11f-8c8beb61d2d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).