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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38ee4c5f3fbd9cbdef981243697a289bbb17bb5dd42bc095e647e56f3350c76. 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/c8bb744e-41db-4c7f-991e-5ba61ec49171.json and https://artists.proofprofile.net/proofs/artist/c8bb744e-41db-4c7f-991e-5ba61ec49171.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38367de8e92b1f3f64f2e0e7747ed0760ecfe0fb74940da25df032086b86647. 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/GBLV62308061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7abd665e6c2b401f6ff00cac527a073f62a32b9002225a6f51361b703bbcafc. 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/CA5KR2334115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ef0ed4fcb1f5ae3051204505f9d535bcca549f86d507772741f41e1a66736b. 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/CA5KR2325483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c35b6f1923bcd9cd21cdc3c2af7bc77d49bad9233f9c0103b616e93ae667734. 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/GBHYE2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9148842180acf313630cc473ce35603b67495a29ec8ac4a4d79c861e84761a3. 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/CA5KR0018840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61381b9fb531364e0048d31b97d0a83dc8995710fab04d9607e70fa5a017f85. 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/CA5KR2148776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8886631a0f2f8dbc137a25d543bd78c5c0f69721b74a7b7e6ee75eb2d8c32aa1. 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/GBKQU2497476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414af52e96959d81a86400fdb8dbb85a7f1709e696a9efd7894eef31026cb0bf. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBKQU2497478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1047cbb20099141c21774d8e5ac5a365cf9f38eb06c44eab675342d45bed1100. 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/CA5KR2132348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad87768c27584ea6a482fb98e1fe3e7304cf3cc68df11c9661c2b4bbc8927435. 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/CA5KR2132352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5886a49e8bd832760326db7427f531bde157677e00959390a03f70626f43c7fe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2189140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f32641e014afe6c71a3edcc53a65c54edf1ad22e2d0c8d03bb4723a23a601d. 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/CA5KR2279103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc280f6240df6553880866c624730561257611ecc8b40fe854a9fa4153def20. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBHYE2500014.
NQ State of Mind, Vol. 4 - Continuous DJ Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b265d0dcfaa09054fae2ebd9c04c626a91a920e13c727c0d012f3098cff7b9. 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/NLM7H2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a012fc11d64dde4aa1ddee3db3fd197a5583a69c1b1154967c849aaadabc37. 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/NLM7H2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48046f757315829111d880229f5a1dedd650939b556795e0779250a0719e55ac. 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/NLM7H2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc722ec23e3caa20f26a4ec49c6ab4de486c9b7fd06fe19f35dc4bd6cab3eb7aa. 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/NLM7H2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1a8eb95ca634f37a4f79268565fdd153b7aff156685769ea14efe437adff65. 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/NLM7H2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85195e8f348730365675f19b5804acd34160a6d2ad3126b6e2580d3003304d65. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NLM7H2400013.