Piano in the Background is an album by American pianist, composer and bandleader Duke Ellington, recorded and released on the Columbia label in 1960.A Duke Ellington Panorama accessed May 14, 2010 R
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 0x81a4a7590c547cc2c086e5ed985129a0d37c3e98d601b4377704c78ea48ae58a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4686f88-0f25-4c90-a9fd-5dd93b55bea9.json and https://artists.proofprofile.net/proofs/artist/c4686f88-0f25-4c90-a9fd-5dd93b55bea9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).