Gwen Verdon (performer), Bob Fosse (performer)
{"copyright_id":"0x7d22c5527bef8598576de0a24fe3ac4ad77dd61db00c1bbbaf0c28a35ad7edda","name":"Gwen Verdon (performer), Bob Fosse (performer)","registered_at":"2026-06-20T13:27:18Z","symbol":"NIM1621571","token_address":"0xb2ee9cfa24f38474321d5cf4650296df5a455c5a","type":"artist","uuid":"b375949a-9ea4-440c-ac65-c7d9ab644002"}
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 0x7d22c5527bef8598576de0a24fe3ac4ad77dd61db00c1bbbaf0c28a35ad7edda. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b375949a-9ea4-440c-ac65-c7d9ab644002.json and https://artists.proofprofile.net/proofs/artist/b375949a-9ea4-440c-ac65-c7d9ab644002.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).