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 0xdc4fbba01e974c7bccdff454fa0f5c52e68e081c253760c3f5cee3f58ef36237. 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/614d6df1-f3c6-4b9d-843f-8e40599d6c26.json and https://artists.proofprofile.net/proofs/artist/614d6df1-f3c6-4b9d-843f-8e40599d6c26.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 0xed530a52f29ad4d8fcd4a15facab8719fcbe3b83b9e166281920a3d228ba8109. 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/NLG3W2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619a230a391479031a96e84fe7c8080f7d39fa46212ff2e6f1f41a4429c9c4b7. 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/NLG3W2300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccbb480bb289d54159efff08ea8c8b79c24edec3e7ee29afb6e58866aaa7bd7. 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/NLG3W2300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de9fc5e3e0de171a4d7634a7c11f98d7bc46e45dbb0f1bda4a16e18b8e9d5d4. 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/NLG3W2300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bac234c724e764babeb167b52b7f534deefd8dd4532574d939305b1daf94bd0. 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/NLG3W2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfab40e307740761891e7eda615b95b15673fcac7d91e8129e1042d794f1ab98. 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/GBKQU2469041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112e1f52e91c94420c5667361178652eed99f89dbfb0d0a08654b05b8084ca79. 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/NLG3W2400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82eba7c69d7647e8f980db6b5012f28c7fa482b076c6d1bfc1adf5efd27f0f9. 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/NLG3W2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb141ad2db4395311fb146760a8d6b6b0c4b3a6ea0222a6290810914abf714956. 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/NLG3W2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70985e0c289f2d556d66c81583c4ca7a9fba99cdcf487152dc8b901455a6caae. 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/NLG3W2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cfb28957ba8f5249920827286b9e0b585dc4c4a2f3ff17c19066e8f1476f99. 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/NLG3W2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16f37c871ad058b296719a45d1a6fb49222878fbc0ad72f84bbd3e75b3d10e8. 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/NLG3W2300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe030bce4296456d52cc2ae134286fb0af1398bacec31b4d45f6f260e4dff7096. 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/NLG3W2300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba2fc1f7bf3cbb9c50bba22fcd9ea045d09ff0f9b22f004c8e643f82bad1f32. 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/NLG3W2300268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654289d9d2f52a391b461810fc547366dab5d803529f49b921a78bad2c18af98. 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/NLG3W2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112e1f52e91c94420c5667361178652eed99f89dbfb0d0a08654b05b8084ca79. 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/NLG3W2400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae5db90d1c24b1ce0d8a2830e17f40e12c2a2e53b29ef236addc02d3fc875df. 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/NLG3W2400192.