Northbound is the first greatest hits collection by Australian pub rock band Cold Chisel, released in Germany in 1983. It included tracks from their first three studio albums, Cold Chisel, Breakfast a
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 0x38df8c59135a8a454f6db3250a15f68132cbc5ab9bdacdd9179ac4c5beeb285e. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9315d2b2-0e57-4bc8-92f2-857316a5fe7d.json and https://artists.proofprofile.net/proofs/artist/9315d2b2-0e57-4bc8-92f2-857316a5fe7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).