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 0xc9831cf39f917f33cb321c8741cfd2a8b02033794979ff4e1450a3be2ad94bb0. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff8280cd-c632-4305-8ac7-0a4366fecd71.json and https://artists.proofprofile.net/proofs/artist/ff8280cd-c632-4305-8ac7-0a4366fecd71.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Church Bells May Ring / Pretty Little Girl
This Is the End / Don't Pull, Don't Push, Don't Shove (Digital 45)
My Dear, Dearest Darling / Now That I Have You (Digital 45)
Baby Tell Me / Little Darling (Digital 45)