William Close and the Earth Harp Collective
{"copyright_id":"0x864466fe7b9af1ee7a137f631fbe4f662caee4dcc3a9e2c8a1ba906cc3c03750","name":"William Close and the Earth Harp Collective","registered_at":"2026-06-17T15:36:25Z","symbol":"NIM1440356","token_address":"0xd8b19385a14a8123ca2de8b4e87027333f43bbf9","type":"artist","uuid":"8f183690-4d6d-4f45-abf7-3654e9f1ca9f"}
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 0x864466fe7b9af1ee7a137f631fbe4f662caee4dcc3a9e2c8a1ba906cc3c03750. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f183690-4d6d-4f45-abf7-3654e9f1ca9f.json and https://artists.proofprofile.net/proofs/artist/8f183690-4d6d-4f45-abf7-3654e9f1ca9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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