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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5279a3902443fa97ccfc8dd983ab542a450c05cc23c4635f3a8f5bc14bbbcb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f56350c-4b76-4a17-9ef5-69b38358fab1.json and https://artists.proofprofile.net/proofs/artist/7f56350c-4b76-4a17-9ef5-69b38358fab1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
(Please Lord Let This Be My) Last Goodbye
TRACK SABBATH, Vol. 2: Songs of a Very Bad Year
TRACK SABBATH, Vol. 4: Analog Hell (Original Board Mixes)
The Inevitable Interlude (Original Board Mix)