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 0x2460c4e1b669b4f0c21bb53351b3e5f5e61a88aefd545f24b92214b5cab9404a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d09fd3c0-96c6-40d8-8918-f03d209c89fc.json and https://artists.proofprofile.net/proofs/artist/d09fd3c0-96c6-40d8-8918-f03d209c89fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
PROPERTY (an ode to Roger Syd Barrett, a genius, 1946-infinity)