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 0x56666356a63451eda303939cb30d6cd717593b9837c3b087f1afd230a9f8e989. 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/42ad92c9-66b9-4638-a9bf-ffb1001584b4.json and https://artists.proofprofile.net/proofs/artist/42ad92c9-66b9-4638-a9bf-ffb1001584b4.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 0x23e89ba78ca5e4d56ae5cb0ca4c3229c572793651ea5930988df653e66160c19. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXF012301215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67b4dcb6da15c37ffd57b288c6c0d62300a5ae671b6e3c8c6f49b0ba0a20caa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BK4DA2406446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7da150edc7f4c90176e183c181edcc41b233df98170962ac99b0aaf710880f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:33Z), 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/BK4DA2415062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68b453634491c39d2eda2e13e3ea00320e395b78802526e81793d4072d4023. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/BK4DA2454785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ece1e62f405bd092049fbe66ffb8e5ad1abd9a67f7a45fb979713ad71e4d1f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BK4DA2505251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867c728407a8527c597ee84967dbb83a2169a089fa09918292d61f95a0f47957. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/BK4DA2505248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0491476959cb07872f60674980093da9ace68b00593b7fef6ba62e4bebc8419e. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:40:27Z), 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/BK4DA2505253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3614fa6c474d9b5bd5c8657c0a9bdda0192b7fe50cbfa50b3c5f6b20a0e9c1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:35Z), 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/BK4DA2505255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870ee69d5e4a045db07343e2e873661bc9e541a6cf4c1aac01379c9537cab7d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BK4DA2505256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2e9fb3a387950b6fe2012c776de15d8588aa75e2dade876f0fe0e30269d559. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BK4DA2505257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e03f209ffdd4b431084ce820a405075fbaf947af08d7524c8fe9dec56016a57. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BK4DA2505258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1753a32e93b20c9e8eb9c77f78a1bb78f9615f02481fcec6993a1403b52fe30d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BK4DA2505259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b6ffe6d3ec78219f4e8836b385363c95b1e27c776cd6d75b7696e18649cf2b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T11:31:28Z), 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/BK4DA2505249.