The Top Notes were an American R&B vocal group, centered around the singers Derek Martin and Howard Guyton. They released a number of singles in the early 1960s, among which was the first recording 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 0x1d14e9999e72350d3c785546d88e0e0f2202eb3bcbe2670209894eac7e38c778. Chain 2 (Bitcoin): anchored in block 954141 (2026-06-17T21:14:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80330dfc-5990-4c24-8032-65494c36ef2a.json and https://artists.proofprofile.net/proofs/artist/80330dfc-5990-4c24-8032-65494c36ef2a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).