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 0x2ac74098e50b33bc656a4b2ae04ebdc6369ff2862cd5db73865c5a0f9e366c25. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33e2a099-5cf7-47f7-a439-351922bf6df5.json and https://artists.proofprofile.net/proofs/artist/33e2a099-5cf7-47f7-a439-351922bf6df5.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 0xcc2e417e6d17aa0e23a522366d23d854f0108dc37d2620994124e3eab752fe15. 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/TWD952312101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff06de7a1f59bc46d4dff7df97addfe5a07f91beff87a2dcf6417c7caaa85c6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWD952312102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeccd9855ba3fe89dd0ebfb8fd3cc1efc2e47da5afb892e4df1f9d196133fc1. 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/TWD952312103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e8896a24630905bf054a9bdf149e67602810d8bd49ef6b0a1ee11acc83979e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWD952312104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a9f004df814ac5a483280632fb11657c09b1ac8c0f05ec785668fb5a7f5e2. 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/TWD952312105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc1b020ea334e699496d039a2d330602b41315f6f8a0efd5d1485fd96a64d69. 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/TWD952312106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ab8388b94787fa7ea308182f058ce78b2d382e6ab2b8d022acda5425464405. 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/TWD952312107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0949e190e08b93ce023787d9a3bd00559c70f502f1cfc456697ff72c5673dc. 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/TWD952312108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b359b32e850a35b8ec81a66cd5f6014a328ba47af00bc5636946b354b750bca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWD952312109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27a63f4c0a92ed68c67523fb509c08253370117dfdaec00afdcf29a7062d891. 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/TWD952312110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccb94456fbcde813a49f2017072b8ecbb4f21e7c34293cae193e74700f04b05. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWD952312111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27a63f4c0a92ed68c67523fb509c08253370117dfdaec00afdcf29a7062d891. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWD952312110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b359b32e850a35b8ec81a66cd5f6014a328ba47af00bc5636946b354b750bca. 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/TWD952312109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0949e190e08b93ce023787d9a3bd00559c70f502f1cfc456697ff72c5673dc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWD952312108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ab8388b94787fa7ea308182f058ce78b2d382e6ab2b8d022acda5425464405. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWD952312107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc1b020ea334e699496d039a2d330602b41315f6f8a0efd5d1485fd96a64d69. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWD952312106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a9f004df814ac5a483280632fb11657c09b1ac8c0f05ec785668fb5a7f5e2. 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/TWD952312105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e8896a24630905bf054a9bdf149e67602810d8bd49ef6b0a1ee11acc83979e. 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/TWD952312104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeccd9855ba3fe89dd0ebfb8fd3cc1efc2e47da5afb892e4df1f9d196133fc1. 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/TWD952312103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff06de7a1f59bc46d4dff7df97addfe5a07f91beff87a2dcf6417c7caaa85c6. 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/TWD952312102.