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 0x4d430aff77530881dfec992a8c6ee554fdbb937b89b66ad1a745d20c2e6d75ee. 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/3228da09-e44a-478c-bf13-5ff7f78f169e.json and https://artists.proofprofile.net/proofs/artist/3228da09-e44a-478c-bf13-5ff7f78f169e.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 0x89afc54f0636de5377ac604fb0dfeb8eedc0366a79f3f3b8458702e93aea5fbd. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBEWA1903426.
House Massive (feat. MC GQ) (Johannes Albert Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db5969ac8b9d39107c9d5c5edbac8836daacd00981ca1db533735277c72e790. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB9UU2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41018d4c034f52ef6041be9ec045bc91cb59491add26ab919cccf88a1f06d4b6. 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/GBCJY1800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e674702c68e2d55fece4b2556f37534e6992134941ba2de8da7fea4bdcb1a2. 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/GBCJY2000669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4726a0218ceb5205511de6d550e3ad8adc0f9eed2e41b1d7cbfc46a8c1249643. 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/FR96X1948319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4726a0218ceb5205511de6d550e3ad8adc0f9eed2e41b1d7cbfc46a8c1249643. 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/FR96X1948319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d544e6527f0ab27a20de663109cc2b6c56662dc96855e1a488cde3000d676b. 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/UKEWB1600272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d544e6527f0ab27a20de663109cc2b6c56662dc96855e1a488cde3000d676b. 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/UKEWB1600272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32f55ffadcdfadcadb0bb8dd20b92566ae70fb570f075004a93230748450ab2. 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/GBPWR2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db5969ac8b9d39107c9d5c5edbac8836daacd00981ca1db533735277c72e790. 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/GB9UU2300022.
House Massive - Gaetano Parisio SouthSoul Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b9314776bf1f878a67f69d04bb6d0d62cc80a2541ff94a0ffc00af43ef9653. 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/GB9UU2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fd76d299528d77255bf93d4475d0c90bd24f1fa4be9d5d15d51adf6eeffb60. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB9UU2200048.
House Massive (feat. MC GQ) - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208cd26bab7ebff5f6f7347a87ada49d8a18dd513299dc8a826772a902b0f9d0. 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/GB9UU2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b273113053a766b7c37bbc805b5e177687f33c54a65b5d518279e353e0723a9. 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/UKN6K2001262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5318f39d115735b350ef4274c9ffd48da4d43b062fc720cfc9ffaaa930ebf227. 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/GBCJY2000251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b444b2264bafbd88992b4f8cda2d525862ae55a836a32b171f6666357d8aac5. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBCJY1900084.