Daniel Marco (born 31 January 1966) is a former professional tennis player from Spain. Biography Marco grew up in the Moroccan city of Tangier, where he was born in 1966. The son of a competitive swi
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 0xa95f79ced1f7f96c977e76d64c247b319b2afd4df430fab68626ef04d5f2bb79. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6ea4a55-a9ea-4c72-a8a4-d46601ad5707.json and https://artists.proofprofile.net/proofs/artist/d6ea4a55-a9ea-4c72-a8a4-d46601ad5707.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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