thumb|Grey noise spectrum Grey noise is random noise whose frequency spectrum follows an equal-loudness contour (such as an inverted A-weighting curve). The result is that grey noise contains all fr
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 0x73062fde6f93419dedaf957b4a0bb3ce2dead650a383f64d90298cb3ec78352a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e93cdd3-cf41-4e87-9c3e-59a2a8b8ba0c.json and https://artists.proofprofile.net/proofs/artist/8e93cdd3-cf41-4e87-9c3e-59a2a8b8ba0c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Loop Grey White and Blue Noises for Calm Sleep