Desmond Mpilo Tutu (7 October 193126 December 2021) was a South African Anglican bishop and theologian, known for his work as an anti-apartheid and human rights activist. He was Bishop of Johannesburg
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 0xdcc72c2ec42289d36571fc8df74392aa9c66f9f8d1d904e3c21957ff339e683c. 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/90ac32ce-f650-4243-a864-b52ed755e8f0.json and https://artists.proofprofile.net/proofs/artist/90ac32ce-f650-4243-a864-b52ed755e8f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).