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 0x30189e70e2146792fbfd07d4d3154105e26e865d510a6a124b0b721e55d4fbec. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58b7a6b5-c299-4164-8bcb-42471a301768.json and https://artists.proofprofile.net/proofs/artist/58b7a6b5-c299-4164-8bcb-42471a301768.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jazz Manouche - Ambiance for Spring Break
Music for Amusing Earth - Delightful Piano Bossa Nova Duo
Funky Background for Chill Out Reflections
Piano Bossa Duo - Ambiance for Comforting Reflections
ジャズチューンで植物を育てよう