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 0xbc8bde0efb6d30392a6373172ba9f3dc76f0bb165e43be635376238705cb9ca9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d399947-49d0-4905-b39f-d9f53e3e5f31.json and https://artists.proofprofile.net/proofs/artist/9d399947-49d0-4905-b39f-d9f53e3e5f31.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 0xb04dcd5f02336515abe32b187fb7f9a6f7987727b40981575385f16412100817. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US7VG2273262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462942e966004537f678f67d3cdef8cd226910b1d2775d630fb668c65b9d2e1f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BCMQE2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c60f03006d65f871c58219f86bc897808f542e40fd62ec61d5020a46c3a3537. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:16:52Z), 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/BCMQE2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf584411bc4921d00f01d30053ac70ba82b02ea1aaf202d9ab6d40fc3dfe85e4f. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/BCMQE2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6035f6c229a4960d4ed392f369679e67ec513f75490a11b0d7ffc5662af99c24. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:19:10Z), 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/BCMQE2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2304c8d5f8c82e15ce33607fc34bd1c503edea258f6db01289e193891cff0a5. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BCMQE2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce736cf270351863763b1b643d4909da148fd81c5872ca2ec8471b86f793a95. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:00:48Z), 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/BXK3S2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eccd57a6b2738aa9e63a5678cd9c383a6aac5cf74577ef83075a2637961a515. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BCMQE2500003.