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 0x4b073a0b71f6a98c53ce10bba6ab66e2c8e8874273c3d5ab2faf210297a5e5e2. 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/3d136c4e-4500-448d-ae50-7c35a386b84f.json and https://artists.proofprofile.net/proofs/artist/3d136c4e-4500-448d-ae50-7c35a386b84f.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 0xb74450971c1efbfdd0fd71678245e53450a86899eed954fb6b734955411c07db. 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/AUFF02300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa75fdfc3f1c7a0c75ba5758afe9c89943a0057353a0ede084ab878c3ee48f57. 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/NL1ZN2001453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4f488bb1b8ff2639a7e0fbb47e91cd5285d509e23b76bbeb680a8ef611314a. 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/GBUM72208567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfca6a2d2a4f5a60246b8b0dbfe3038092441d6f012975a05a32a36c23ff08a1. 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/GBTDG1302650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b2d81196d1a26d9e39d2bf9eb34a764bbb41d3600026813733290f1aa2006f. 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/CYA112200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dfdbf19a6f7740c8105171fde92ee94e6f2d8834f65899bc0d21f753136668. 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/ZZOPM2236354.
Under The Sun - Vintage Culture Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94ef104da8718ec05a4b59ba9650aa77dc89cbf3676a78cf975b660b07440ef. 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/ZZOPM2236355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1002674477aefb8590a8f6363a58a66ac7de4b64d1519440a9849bb5ac939ac6. 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/ZZOPM2229118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa75fdfc3f1c7a0c75ba5758afe9c89943a0057353a0ede084ab878c3ee48f57. 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/NL1ZN2001453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a4b399b354502a0ab9da215edf8554e41e2af0641e64ae1923d1a79b7cce7d. 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/NL1ZN2302477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e54073635ca7daf9dd07144f3a2c2e93f597ec026a2863ebae532e501bd9cb9. 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/AUFF02300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4f488bb1b8ff2639a7e0fbb47e91cd5285d509e23b76bbeb680a8ef611314a. 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/GBUM72208567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051a7e4c99a3b0b90524e6647d12b31834be97c29a25efa0754238f14e549755. 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/GBAHT2200806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66efb464c9b4aa586dc6d64a7ecb0479814ca164ed36b38a00c09c247f23804c. 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/GBARL2401943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87501dcb61a4233f338b688eee255707c4ef4968e84d55d5bc6de26ead46c424. 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/GBARL2401535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87501dcb61a4233f338b688eee255707c4ef4968e84d55d5bc6de26ead46c424. 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/GBARL2401535.