Marco Sabiu (born 1 September 1963) is an Italian-born musician and composer who has worked with Take That, Kylie Minogue, Barry Blue, Christopher Lee, and made music for television. Career Born in t
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 0xa7216df3d2364200b34ca18440dd0b541ba60f07c373107d0ee9743401f9d227. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fef664ae-4b56-4c92-b336-0f9e569b4403.json and https://artists.proofprofile.net/proofs/artist/fef664ae-4b56-4c92-b336-0f9e569b4403.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).