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 0xb205a0bd8eccbe1923398a0809b89c868876dd4157f78b6efcfe3855f38e1c57. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5716605-0d69-43f2-b8ee-a543f8b1cb97.json and https://artists.proofprofile.net/proofs/artist/d5716605-0d69-43f2-b8ee-a543f8b1cb97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sound of Rain: Heavy Drops of Rain From Sky Vol. 1
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Soft Rain: Relaxing Music for Study and Concentration
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