A cartel is a group of independent market participants who collaborate with each other and avoid competing with each other in order to improve their profits and dominate the market. They seek to limit
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 0x42bf6b30984f02075ea4cd233fc1b88d9b54dab3658e287b83f21930fce87a35. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13bb78e5-7d2a-40c0-a964-3ef8d7017de3.json and https://artists.proofprofile.net/proofs/artist/13bb78e5-7d2a-40c0-a964-3ef8d7017de3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).