Robert Cecil Kay (16 March 1935 — 5 March 2011) was an Australian rugby union international. Born in Sydney, Kay was a Victoria-based centre, capped twice for the Wallabies. He made his debut in a wi
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba06799f8d7b7782d6c95457768da7b465f336dd45bcde5ed76b57b85e460e35. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22ce54fa-5135-4d49-b118-a3c91d6ec1fb.json and https://artists.proofprofile.net/proofs/artist/22ce54fa-5135-4d49-b118-a3c91d6ec1fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).