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 0x1644edafe5218ddfa7dadd1798555e92bc564654ad5c5c473e6bca3321ff3010. 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/133b551b-8763-4f58-a8da-bc25a4c20a55.json and https://artists.proofprofile.net/proofs/artist/133b551b-8763-4f58-a8da-bc25a4c20a55.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 0xd7a8b7e6813ecc671d26d33bf2ed9f1fb996f254433805a9a8e15e12db11355f. 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/US38Y2408936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbd861c520657f625ede999d45ed410878ffbb64e7207268ec29dbb0a6b5613. 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/INS182201485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c9047e0a1ec96baba3be4aecabf7ae95ec75a7ed6aeabc01150dffc171b476. 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/DGA062465518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57bace5eb878e54c766735ac267b528e951869af59b556feaf593ea8258c56c. 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/USA2P2425013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca6f940dc8284f4a929c96480fb735754138264d3800b3fe6c4799851b5ad87. 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/USA2P2419002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570173eda78f5253d3d93dfd49eba7b45358bc7c43a7f6ed7e59cfa63e32961c. 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/AUBEC2412666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5653cba3b7b060afa6ccafadc1189b5020bba3c23d8feb7ee7127b9fa8c171c3. 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/DGA0M2373878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cabcb70bb5c2b60e807a5c1c27e1976c7a6ed79eac0115176fbaad73364d667. 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/INS182300583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bedbd6cdf1bf8c4991f3505f585f83f0f90d37e498855025b6bb32dfdaac29. 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/TCAHB2392942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2402610c8cd1ce47185ed4c593b923d18dd5b38daaa4c77b89c7cce82a0b0b. 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/TCAHB2392947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42195b3ab2f5ff073940a246cf707a158da45ca7ccad5be2eb98a49124457837. 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/TCAHB2392957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918d11e20725fd1662f389d6185b621c125d18a14ac9630aae1456ef0dee4633. 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/TCAHB2392971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e0da91fe794b820ba1065e35be6b3d2af776a59a51ef4bc1dafb5469d3ad5. 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/TCAHA2308839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6484c4cbb3688458cedf9a8c039541d771ee2991fae4387bedc5dfe991eae152. 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/INS182000910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31ddd52e67c9f0678979c9ab2428cb5652182a76c968938760f8ef851bd1bf3. 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/INS181905568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c3fd2b743090d81dd42ac9210e536ce6b44d27ebd2490317c4e6aa78e9cad3. 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/FR96X1968363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e27bb4fc0d7126cea495007a44712e4e06f7a852fa2981a4eaf6992e554062. 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/FRX202243961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a5161b15111d868872c05c1d22a33ffa6c00f0aa8fbc6097df423c186699e2. 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/FR96X1946940.