John Williams Macy Jr. (April 6, 1917 – December 22, 1986) was a United States government administrator and civil servant. Biography Born in Chicago, he received a B.A. from Wesleyan University in 19
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 0x4b939eb837ae8d5f871a5e906547a764351581b924c80f88dcb6dc90baf178b1. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1225775-93f4-4e8f-8c7c-52d07b79c23e.json and https://artists.proofprofile.net/proofs/artist/c1225775-93f4-4e8f-8c7c-52d07b79c23e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).