Marcus Hamblett & The Missing Metatarsal
{"copyright_id":"0x84df192a2336cbbfbba1fce4c9d7ff2ee3ad00c2a419bb7ff79ffeb4c53fa549","name":"Marcus Hamblett & The Missing Metatarsal","registered_at":"2026-06-20T17:57:42Z","symbol":"NIM1676760","token_address":"0x1a72a7a02d49a1fe3a73d256359b6836c17e0a6d","type":"artist","uuid":"be74ae87-f051-4fe9-8b56-cd897712e987"}
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 0x84df192a2336cbbfbba1fce4c9d7ff2ee3ad00c2a419bb7ff79ffeb4c53fa549. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be74ae87-f051-4fe9-8b56-cd897712e987.json and https://artists.proofprofile.net/proofs/artist/be74ae87-f051-4fe9-8b56-cd897712e987.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).