Hugo Lafayette Black (February 27, 1886 – September 25, 1971) was an American lawyer, politician, and jurist who served as a U.S. Senator from Alabama from 1927 to 1937 and as an associate justice of
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 0xc823c505aedfcedb8f74013d2d7d4e86788afa6f25a798e5f4431fc416ffa636. 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/8e1aa9a8-58ba-4616-9efd-f83a4192fafc.json and https://artists.proofprofile.net/proofs/artist/8e1aa9a8-58ba-4616-9efd-f83a4192fafc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).