Marcus Rojas (born February 23, 1963) is an American tubist from New York City. Early life Rojas was born in New York City on February 23, 1963, and grew up in Red Hook, Brooklyn. His early influence
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 0xb7aa75bcba0935a36f405edd920a70ee46ec4dfc92f46364542228348e714e36. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4d9b030-2c50-42d6-8e6a-3b541ce6ef25.json and https://artists.proofprofile.net/proofs/artist/e4d9b030-2c50-42d6-8e6a-3b541ce6ef25.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).