NATAL or Natal may refer to: Places Natal, Rio Grande do Norte, a city in Brazil Natal, South Africa (disambiguation), a region in South Africa Natalia Republic, a former country (1839–1843) Colo
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 0xe4511b552854f735a4c7ee43298752ce05c17dcfc1de7aae0b2b45a49a34ce3d. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4f7f795-d72f-4180-9814-44a04463a6d1.json and https://artists.proofprofile.net/proofs/artist/a4f7f795-d72f-4180-9814-44a04463a6d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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