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 0xcf89756b1c0c3e333c94723c66e5ce50b222c25b00662fae01bff06438c7d325. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e63d27e8-c25f-45e3-9596-369c8dc5c377.json and https://artists.proofprofile.net/proofs/artist/e63d27e8-c25f-45e3-9596-369c8dc5c377.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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Music for Relaxing Controller - Soprano Sax Solo
Music for Rainy May Days - Casual Jazz Guitar Solo
Music for Cozy Rainy Nights - Jazz Guitar Solo
Quartet Jazz - Background for Energetic Feelings
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Beautiful Jazz Quartet - Bgm for Summer Love
Music for Summer Styling (Jazz Guitar Solo)
Music for Fun Dreamscapes - Jazz Guitar Solo
Music for Turning Heads - Soprano Sax Solo