Jon English, Rob Carriker, Marlborough Singers & Marlborough Chamber Players
{"copyright_id":"0xc0095da7b1d1f0015e541f93a4b72d59d539b571d4abe1ab489ce30a4462c067","name":"Jon English, Rob Carriker, Marlborough Singers & Marlborough Chamber Players","registered_at":"2026-06-15T00:50:21Z","symbol":"NIM0630013","token_address":"0x05fe7cf20a2e775ddeca9df74b2fc4d230ec2d69","type":"artist","uuid":"c0b8d9dd-c6e5-401e-99dc-a33a2890f653"}
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0095da7b1d1f0015e541f93a4b72d59d539b571d4abe1ab489ce30a4462c067. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0b8d9dd-c6e5-401e-99dc-a33a2890f653.json and https://artists.proofprofile.net/proofs/artist/c0b8d9dd-c6e5-401e-99dc-a33a2890f653.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eec8c425813b2ab997d184dc246a8582918a729b9e1783b9ee2b7e43120fc13. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US8350566201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d625ac4c49a195fbe1e4ee5eb6c12f2deb5266e3c1dcf7d9053303c62469282. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US8350566205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc40eb9fffa5930ab78eb1dad019cec1e4715f0441095eabf2ec97a63264ae79. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US8350566206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ade87fae6586a3424ff22b90a5d90c819e595ffa4cf77243bebae6201cd02fa. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/US8350566209.