{"copyright_id":"0x1c7e2e6c530c831e66cfc0c3882fc7bfa5394577b5d5c63cc2159bedfdb2203a","name":"Brandeis University Chamber Chorus","registered_at":"2026-06-16T03:33:14Z","symbol":"NIM0924295","token_address":"0xf561fb6fec85b8c7be6b552a5cff6eca335c9eba","type":"artist","uuid":"285b1515-1a10-44f5-91b6-51e15ee9e3c7"}
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 0x1c7e2e6c530c831e66cfc0c3882fc7bfa5394577b5d5c63cc2159bedfdb2203a. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/285b1515-1a10-44f5-91b6-51e15ee9e3c7.json and https://artists.proofprofile.net/proofs/artist/285b1515-1a10-44f5-91b6-51e15ee9e3c7.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 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 0x9469ca0f4c726c000974601c3809f11b1ae366029917cdd652460c433786aee6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSM11202205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d2d6ea6faa11ae41f78248e35fa0f9bb72028c12c1bdeffa8063528b9b020a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM11307912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4bc82af2b8628c8429e2fba8ac69ac167da5230bba3bf8bf1d1e7cd64d369d. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USSM11307913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d2803df0d4e9a5b8bdce726b25efa3569dcddc169340b99c7d0f99f3e636a0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM11305391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1e0fbdfced2acfc370dc33f4caf337cbd0be438cf1077b7d23355806ff9616. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM11307914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9245111a5c54edd93c88b10ab656138ac61693b8b05a077016aedc830002c989. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSM11307915.