Roland Roberts (October 22, 1897 — March 31, 1965) was an American male tennis player. Tennis career In 1918 he became the Pacific Coast lawn tennis champion. In a tournament that lacked most of 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 0x00edc1ce435aeb53925b68f79bcf35e8c8cab78d75ceec5812ba830185bef33a. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25fe6613-5df8-4976-b2a5-48be15426e69.json and https://artists.proofprofile.net/proofs/artist/25fe6613-5df8-4976-b2a5-48be15426e69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).