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 0x2b0b30ad2f82d1fd9f1687e20ec125577364ee03ecd8d1f60bb3f1dbffe18911. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f05c9886-517b-4fa4-806e-47a0751ddbe7.json and https://artists.proofprofile.net/proofs/artist/f05c9886-517b-4fa4-806e-47a0751ddbe7.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 0xe40d9dea625973339b4a4c5773a7edf478dc624a564c6211ff0ff9764cf07df8. 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/JPC402405015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a9cbe4b01f7340d96b65b3c628efe225eaef5e63c953430f9cd6f5dbec0a05. 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/JPC402404001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40d9dea625973339b4a4c5773a7edf478dc624a564c6211ff0ff9764cf07df8. 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/JPC402405015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a9cbe4b01f7340d96b65b3c628efe225eaef5e63c953430f9cd6f5dbec0a05. 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/JPC402404001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436740097ec746645ba92be1b06b129fa754cd7d27a2965ccc9ffbd08655ff7a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:27:05Z), 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/JPC402402058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b375e545a2b55834bb5952063574fcb210a29a835d00c8dd402bea8b59db72. 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/JPC402309002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709c737cebd0d246c161e8267d92d8c181fff1e51cb329423c4e0335805094c3. 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/JPC402306006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc94fd90f37d832b9724d06e142cef655212b23d3968bb3b45d3a5fd2e4bb70e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPC402301003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3580d801b85619d1d876d9b5f84241b2d3509fba4d928c3b460f9e1ba37a2609. 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/JPC402301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46fdfd89fb39619188ca122606de08952fd2469ed180ecba9bcb5e97408c777. 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/JPC402210023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7158896f0587c97312fd58a40729a0095a6a76762d1269dd60dd96991b7a885. 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/JPC402206019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ef4e256d32f47e73de116a3777efd96d64816c47d4b0bf431177772c8bc326. 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/JPC402203001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf30686cc2be25adfb649e61e6bd371e6a5af4dda0e4cca5f789d86d1b55259. 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/JPC402112009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc168f767cbc973349e53aeb89b44257a7695ee0eaf2907bc6f426172feb8edf. 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/JPC402410014.