Thomas Jacob "Jack" Black (born August 28, 1969) is an American actor, comedian, and musician. He has played leading roles in family and comedy films, in addition to his voice work in animated feature
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 0x84033f2346285258822b4e68c04762335560e576d3251260d1216c6aa511e0e5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a15726f-6204-459e-9a35-30a2ff4437dc.json and https://artists.proofprofile.net/proofs/artist/9a15726f-6204-459e-9a35-30a2ff4437dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).