John Howard Carpenter (born January 16, 1948) is an American filmmaker, composer, and actor. Most commonly associated with horror, action, and science fiction films of the 1970s and 1980s, he is gener
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6083cc29e8a1ce9753eb61484ab4cfafdfae689aefd1c28d7622b6fd8efa3a7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/655d0fab-814b-4da2-8cd3-f5d4b1f5094b.json and https://artists.proofprofile.net/proofs/artist/655d0fab-814b-4da2-8cd3-f5d4b1f5094b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).