1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x70e52440b489a36df20b7aaab3e5f2cc95568fa3438322edd2bb8377c7a573f6. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a763d81-a6e7-4157-baff-e7a5b322a64d.json and https://artists.proofprofile.net/proofs/artist/0a763d81-a6e7-4157-baff-e7a5b322a64d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Madison Square Park, Manhattan New York City
Subway, 42nd Street Times Square New York City
Park Avenue, Murray Hill in New York City
Brooklyn Museum Fountain, Eastern Parkway
Houston Street, Lower Manhattan New York City Sounds
Metropolitan Avenue, Williamsburg Brooklyn
Allen Street East Village, Manhattan NYC
Battery Park, Financial District Manhattan
Utica Avenue Crown Heights, Brooklyn New York
Broadway in Midtown, New York City Sounds
Chill City Somber Sleep (Street Sounds For Sleeping)
City Sounds For Sleeping - Urban Street Sounds For Sleep
Busy New York City Street Sounds For Sleep
Urban City Background Noise Sleep Collection