1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xfeaba6dd3dcd76536ef1d176d91bc6c11b72d671a599a9425c4937ee7bd8f2b3. Chain 2 (Bitcoin): anchored in block 953924 (2026-06-16T09:52:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d0ba4e1-e091-473e-bd22-4ea2adcb4964.json and https://artists.proofprofile.net/proofs/artist/1d0ba4e1-e091-473e-bd22-4ea2adcb4964.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chapter 3.11 & Chapter 4.1 - Bitterthorn
Chapter 5.10 & Chapter 6.1 - Bitterthorn
Chapter 6.13 & Chapter 7.1 - Bitterthorn
Chapter 7.11 & Chapter 8.1 - Bitterthorn
Chapter 9.11 & Chapter 10.1 - Bitterthorn
Chapter 10.13 & Chapter 11.1 - Bitterthorn
Chapter 11.11 & Chapter 12.1 - Bitterthorn
Chapter 12.10 & Chapter 13.1 - Bitterthorn
Chapter 13.9 & Chapter 14.1 - Bitterthorn
Chapter 14.9 & Chapter 15.1 - Bitterthorn
Chapter 15.9 & Chapter 16.1 - Bitterthorn
Chapter 16.5 & Chapter 17.1 - Bitterthorn
Chapter 17.9 & Chapter 18.1 - Bitterthorn
Chapter 18.10 & Chapter 19.1 - Bitterthorn
Chapter 19.7 & Chapter 20.1 - Bitterthorn
Chapter 20.7 & Chapter 21.1 - Bitterthorn
Chapter 21.5 & Chapter 22.1 - Bitterthorn
Chapter 22.8 & Chapter 23.1 - Bitterthorn
Chapter 23.7 & Chapter 24.1 - Bitterthorn
Chapter 24.7 & Chapter 25.1 - Bitterthorn
Chapter 25.2 & Chapter 26.1 - Bitterthorn
Chapter 26.4 & Chapter 27.1 - Bitterthorn
Chapter 27.2 & Chapter 28.1 - Bitterthorn