Kölner Kammerchor/Peter Neumann/Collegium Cartusianum Köln/Kölner Kammerchor/Collegium Cartusianum/Peter Neumann
{"copyright_id":"0xf712c86cdaecc84097c61779d49efcd30fa505ea121ca851364a832949f4283c","name":"Kölner Kammerchor/Peter Neumann/Collegium Cartusianum Köln/Kölner Kammerchor/Collegium Cartusianum/Peter Neumann","registered_at":"2026-06-20T06:48:52Z","symbol":"NIM1545606","token_address":"0xa148aaa7bfb62e01416c732fa928011b42c5c686","type":"artist","uuid":"a411b19c-d3b7-4060-bc69-9014740c03cc"}
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 0xf712c86cdaecc84097c61779d49efcd30fa505ea121ca851364a832949f4283c. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a411b19c-d3b7-4060-bc69-9014740c03cc.json and https://artists.proofprofile.net/proofs/artist/a411b19c-d3b7-4060-bc69-9014740c03cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).