John Cameron/Glyndebourne Chorus/Peter Gellhorn/Pro Arte Orchestra/Sir Malcolm Sargent
{"copyright_id":"0xa6fa3c297dc6fdd6f5844e115b571576b420c082411b6ef6801d0553d8c6d230","name":"John Cameron/Glyndebourne Chorus/Peter Gellhorn/Pro Arte Orchestra/Sir Malcolm Sargent","registered_at":"2026-06-17T15:23:15Z","symbol":"NIM1437209","token_address":"0x538943f6e76982957911663bd8bc687b4c1b0f5f","type":"artist","uuid":"8eaf90fc-7fa5-4c0b-95b5-23d79ea3fbb0"}
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 0xa6fa3c297dc6fdd6f5844e115b571576b420c082411b6ef6801d0553d8c6d230. 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/8eaf90fc-7fa5-4c0b-95b5-23d79ea3fbb0.json and https://artists.proofprofile.net/proofs/artist/8eaf90fc-7fa5-4c0b-95b5-23d79ea3fbb0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
HMS Pinafore (or, The Lass that Loved a Sailor), Act I: I am the captain of the Pinafore (Captain Corcoran, Sailors)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0xe768587b9f7b0bc7666cf26eb532fc323d6b8e1cf65442be73a3a3f7ba7ea4e3. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8700143.