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 0x4fe48fb340da0e9c3c5c0689efda3d6015df5a18bb30036d9cf5c91508e9a449. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88182ff0-7653-4c7d-80d7-bac58f367ae5.json and https://artists.proofprofile.net/proofs/artist/88182ff0-7653-4c7d-80d7-bac58f367ae5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Refrigerators and Generators for Background Sounds and White Noises
Running Water from Spouts, Spickets, and Faucets for Background Sounds and White Noise
Soothing Brown Noise for Background Sounds
Soothing Waves of Ocean and Sea for Background Sounds and Natural White Noise
Shipping Yard Sounds for Background Sound and White Noise
Soothing Fans and Air Conditioners for Background Sounds and White Noise
Falling Asleep Listening to the Sounds of the Road and the Rain
Asleep in the Backseat - Car Engines for Background Sounds and White Noise
Soothing Vacuum Cleaners for Background Sounds and White Noise
Vacuum Cleaners for Background Sounds and White Noise
Clothes Dryers for Background Sounds and White Noise
Hair Dryers for Background Sounds and White Noise
Soothing Waterfalls for Calming Background Sounds and Natural White Noise
Falling Asleep Listening to the Sounds of the Road
White Noise and White Noise Alternatives
Small Indoor Waterfalls, Rock Gardens, and other Decorative Water Features for Background Sounds