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 0x078a30f1760cf579d8128d1d842c57bbc2f6d02527ecf10b5f9060b1d621fe7c. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f81f540d-526e-423b-8d27-5087f8fde829.json and https://artists.proofprofile.net/proofs/artist/f81f540d-526e-423b-8d27-5087f8fde829.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Liondub Street Series, Vol. 61: Hear This
Blacked Out VIP / StillZ & Jack Reeves Remix