thumb|upright=1.35|Light fog in Bangladesh Fog is a visible aerosol consisting of tiny water droplets or ice crystals held in the air near the Earth's surface. Reprint from Fog can be considered a
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 0xdf9f1bcfda59833fd74db06106b1b348679b24bdbf34921ab6c5869929173a54. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6924e58a-b25f-40f2-bd64-3d3bfbc7676c.json and https://artists.proofprofile.net/proofs/artist/6924e58a-b25f-40f2-bd64-3d3bfbc7676c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
University of Electronic Music, Vol. 2 (A Collection of Tech House and Techno Tracks)