D major is a major scale based on D, consisting of the pitches D, E, F, G, A, B, and C. Its key signature has two sharps. Its relative minor is B minor and its parallel minor is D minor. The D major
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 0x57b540fbe8d1196e866b3568bb2eedf9abde6c8aff19deeedd8375e8cb5105f7. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f060cb9e-2805-41ae-aafd-2b2e067cf4a5.json and https://artists.proofprofile.net/proofs/artist/f060cb9e-2805-41ae-aafd-2b2e067cf4a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).