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 0xc9521c47e459a917612d2be85a055c24a99bd0aba14fbdc30c55b7ff689af1c9. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f32432c0-0137-4af0-adfd-0368738a203f.json and https://artists.proofprofile.net/proofs/artist/f32432c0-0137-4af0-adfd-0368738a203f.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 0x281f3e2a929bb9b6b62a64edb54f3040fa1fc864ce4598f8b7c202f617dc1df2. 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/NLFL71600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ba0c30bd74ed0075add2d9d23d00676ebb3b9ba7f19493bd2bf9f94aceadd7. 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/NLFL71700275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd85219575bad7c3e1ac8124056a5facf591cb2b0927af3f685dfdb31938bc0c. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:30:22Z), 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/NLFL71600082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc4a98f56aa7f8ab0e41d736ad97242780f480ea1b1d080708d86b2219763fd. 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/NLFL71700277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30914b786cbf9a39b2f338dceac7dfe5ddd4ea243b61f5b09456827866c506c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLFL71600118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8e1b7cfd4d1cacab7d909aa2cbed8723ea8f50b39385347dd2a8d9d5242b96. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLFL71700207.
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 0x55170014302e7c30357d608a5c57274c86f0aa28e083ce3d2afa341d17ecf303. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLFL71700280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee700ba81ae42990289b03376e6dfd3b85cfee0687b13113660c26dba4408b7. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/NLFL71700122.
Masters Of Hardcore 37 (20 Years Of Rebellion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64614cdfda8147c904cacd9b792c11a9f284b60f7410b6ddec8625ec8325538. 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/NLFL71500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb430dcbf3605676185c6b8f81dd197ac4976b253d1d3373fe20bb047acedc18e. 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/NLFL71500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0930fd10c5ddd268ebaa0a1c6b02463b9c99d943896c5e8a74b3929d94c7efa. 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/NLFL71500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c9cb64dd4a5fb74415aebcb8a5a7be58f3d6499b670019d1db42f65914b926. 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/NLS241400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35cda2aec30f4fdbb4baff92d468eb716f263fbcdfe41891fecd7a8cd10efbf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLS241400929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef1f678832dc8de480e535e62af52c4094d90442dd5990bca82b06ffd1e309. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLFL71500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6a3fc70e0a878f618e311707237c66d46df6e982fffe289f51654381ff738d. 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/NLFL71300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45178f721c43ce70425fba86469e9aad8859a0c804910e45ea80a40937b0e34. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLFL71500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ec390abf02cc3a59cff0c6bd1f24835eeef92bf992c5c4817ba613548b13c7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLFL71500017.
Masters Of Hardcore Chapter XL - Tournament Of Tyrants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a34b1bf93e3d92d23dbdebebb723d7ee13619385a8420b51ba859f6d0945ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLFL71800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434146509cd89c1ebabe442c250c18c109e5ebba51417fe4cf1c18807fe0e754. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLFL71800094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd6d1d93ed7fda7caf5f180cc1169ab67f5bffefa98e52bd02456bfa907586a. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NLFL71500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce9fb617d4d4e5a71457ec66cf35b0899ec4f23f6e3e093a5bb6c1214afb936. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLFL71500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64a1b717233d7b7f009085d7fdba34857e4ab9caadda888dad5dfa3f1814bed. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLFL71500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d3017cb8524af0800bf2dec122ec6ef01736b97ac89af9c54377102bb31457. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLFL71500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a4af45952dc5b7f4d5cdc407f523db57a13cd6c0f1e518258e9ddb74118176. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/NLS241400427.