Robert Tench (21 September 1944 – 19 February 2024) was a British singer, guitarist, sideman, songwriter and arranger. Tench was best known for his work with Freddie King and Van Morrison, as well as
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 0xdc14f3e9be0c19d1bf9e52323d9506336ce10aedf3f4e128e344a0fb93607c20. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c6a3bbd-64b6-40f5-86b0-501495a8d4f7.json and https://artists.proofprofile.net/proofs/artist/7c6a3bbd-64b6-40f5-86b0-501495a8d4f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).