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 0x70c16e2f7f87b622512c16d5ed2b0dc2336370b8ce5a80e91ddccc4a87b97d34. 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/4b17fa6c-84c3-49bb-bc3f-c4c1b38afdca.json and https://artists.proofprofile.net/proofs/artist/4b17fa6c-84c3-49bb-bc3f-c4c1b38afdca.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 0x2e5a65be785f63bb2a522b635ffa73879e10b9cda45b679e51c25abd29c9b4b8. 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/QZK6M2109000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2497e734428bdc5b6230336b0f5e194c7038acefe8dcbaa7747dee68a5d19c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6M2109001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f82a03e4b5ec493f2eaa7fff5cf33f7d2bfa83adc63016e1f339e5c4b572f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNC2197478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6189033d7bbf4b15af49c7099acb1c3449758168015a57638d8deafaa99e9145. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6M2109002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2f9eb50f3fda2150885c37b7e9803b8e6b7ddb7a891040614afdc9b19c7021. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6P2182495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe31d000ea8f65896056d826627a57aaa3168e51295404f53e0b4cbf72a968f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6M2109003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5142100194c8fe47c90471e648f0ab0e9ab58dd7e2f95909fa635a759495e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6M2109004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81efb24775f94fb11b8a7f9540953d0b25e2dce290944441af93f612d92f1e12. 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/QZK6M2109005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c587dcad7fb38dc3f9649af8e239fc1910cec15765d5f4ac37551d6695ea8d. 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/USFW42205901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03b3763785aa07f9f89da6f4f69f0ef450132feff1d12d3eef5c2950efda2c3. 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/USFW42205902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61214d6a80d6c88d27cec6fa78531daba8c2e563db9506b86e0f4927d9dcfb8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USFW42205903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55624371e485a591966d243f438eca26df79dd7d6ef625fb625ba683e71a35e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USFW42205904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c587dcad7fb38dc3f9649af8e239fc1910cec15765d5f4ac37551d6695ea8d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USFW42205901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03b3763785aa07f9f89da6f4f69f0ef450132feff1d12d3eef5c2950efda2c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USFW42205902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f82a03e4b5ec493f2eaa7fff5cf33f7d2bfa83adc63016e1f339e5c4b572f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:29:20Z), 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/QZHNC2197478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bbbe564bd6d961b3da20aa1721a8d520f8e80af18cc45d7afb1f6d1bb120e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN42127064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013be710cd6c4b8b187b30a060f5cf7651026080b482f931639bcbbc60c808e4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USFW42305310.