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 0xa64979b56f5254007e5296f3d50b1f4cc085661407d8251181392f3fea9b33a8. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/642e4ae4-545a-44d3-8af9-15104bfdb2d9.json and https://artists.proofprofile.net/proofs/artist/642e4ae4-545a-44d3-8af9-15104bfdb2d9.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 0xb0ddb2c04a156ebba1ba5eb3676e3c497d35a3c73e4101ae0deea4fbc4d330e4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NOKAR1507020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b1cda6066af4d6343ca9817f97501e92feba9e96214ac63c5a6d80f44f6f92. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/NOKAR1907010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58194837fa016dd5d54a1f356c7557b73caddb5c6133b03cdb2343331898ad9e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NOKAR1907020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c51811ed1ccf515c0ed2198764d974174c8b3f3fd2d504d8ba24fdce65da93. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NOKAR2508060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98fdf583b6b1da5fc4ed2e4d74d1446a78569086f524c02136ee308825c433e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NOKAR2508050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98fdf583b6b1da5fc4ed2e4d74d1446a78569086f524c02136ee308825c433e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOKAR2508050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09627e05884967c69a0bdc054dd4aeba571cf62beeb9e786776e3c718029296. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NOKAR2508030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09627e05884967c69a0bdc054dd4aeba571cf62beeb9e786776e3c718029296. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/NOKAR2508030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14878395597cd600427d080dc7b5ab2faa9fecf3b540e58eec2bca438a09dfe3. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/NOKAR2508040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98fdf583b6b1da5fc4ed2e4d74d1446a78569086f524c02136ee308825c433e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NOKAR2508050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c51811ed1ccf515c0ed2198764d974174c8b3f3fd2d504d8ba24fdce65da93. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NOKAR2508060.
Opus Imperfectus, Pt. 1 - The missing chord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52493ea0c3c3f9a678f8346e81c358a3b2bc8d0a54ea7e4d78cdd51734540bb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NOKAR2508010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c12d21ff8da431a634e0aa990206e5d447740a3fb2afc3ed97b50ff1d17454. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NOKAR2508020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09627e05884967c69a0bdc054dd4aeba571cf62beeb9e786776e3c718029296. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NOKAR2508030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14878395597cd600427d080dc7b5ab2faa9fecf3b540e58eec2bca438a09dfe3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:40Z), 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/NOKAR2508040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98fdf583b6b1da5fc4ed2e4d74d1446a78569086f524c02136ee308825c433e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NOKAR2508050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fcaed1c392841e542ceb8a9fda7072148e87e82614328f829295ff3bf97b3e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NOKAR2508070.