Thorgeir Stubø (12 November 1943 – 22 October 1986) was a Norwegian jazz guitarist and composer. He was the father of jazz guitarist Håvard Stubø, jazz singer Kjersti Stubø and theater director Eirik
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 0x0c04000ba18296240616653e81c4a757cba25e816d8f9d1e990159b4e7531a74. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c64d1627-099e-4c69-b79f-b4f3dfe1b220.json and https://artists.proofprofile.net/proofs/artist/c64d1627-099e-4c69-b79f-b4f3dfe1b220.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).