Mac-Mac is a historical area in the Mpumalanga province of South Africa, and the site of the country's earliest gold rush. It is located near the town of Sabie, 5 km from Pilgrim's Rest. While a numb
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf80d6800bcb39e31168778dfa1c2428c207551a7ec8a47e1d77cd1f71a1fa85. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c04597d-3774-4dd3-bb70-652a6834d79f.json and https://artists.proofprofile.net/proofs/artist/3c04597d-3774-4dd3-bb70-652a6834d79f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).