Kodigo Norte (a satiric misspelling of the Spanish phrase "codigo norte", or "northern code") is a Rap music group formed in 2004 in Vitoria-Gasteiz, Spain. Its members are DJ Loro, Markés, Sok and Go
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 0x02d3b91acbda004983fa0b749db1edc96cf20ea3e6b9a0fd9579d07c916fb88d. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e2fc6dc-6002-4b5f-8d65-d2b0d562761e.json and https://artists.proofprofile.net/proofs/artist/4e2fc6dc-6002-4b5f-8d65-d2b0d562761e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).