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 0x61e1590ebcd5e316f3215c9185fe909e1f40486145a2c65d434e5bb58e490c0c. 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/14127505-ea76-4afe-ae2b-62d50b2a4c27.json and https://artists.proofprofile.net/proofs/artist/14127505-ea76-4afe-ae2b-62d50b2a4c27.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 0x96491eeb2fc9e3bdf295f32a0e8de849d6ea8b6fc21ca7bf3a4289b28771c9dc. 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/NLK2U1900301.
Doe Het Voor Jou (feat. Gio, Keizer & Lauwtje)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a39170b63c5643216e5086c2920b5582318207ccee7984ddb9b08a6eaec5f36. 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/NLK2U2000395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751573284c688b208bb2452a3d7503670b1bc3285d0af70230c86fe45d8117b4. 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/NLK2U1900227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0e987a729f6bd1079921bb3482c669bd158f97caa1b350f8c0f217c9d83fbe. 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/NLK2U2000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b7458df4b3d9a94e2b6dcb61851476ddd05cf763bd1bd835aa76745fdec495. 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/NLK2U2000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314a9f8b268de75607392c0a1e9537803ce10afa7efbe2e58761a69464a34c81. 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/NLK2U1900229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeaeda8d3373371ea8a67e29acb303c7df092d0edff170069497f1bb19ce22e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NLK2U1900230.
Sportschool (feat. Jhorrmountain & Poke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41871ac362fe309f60d5e95cdf5ea146475c16d40e1925b8fcda063171f93835. 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/NLK2U1800168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef62f9d6f0f5c3a31e5729acd7e52bff9909fed5c14c8076fa1420da3f0685f. 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/NLK2U1800164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98797cf9341fbe7a319873c57dd31e8d47216f74770e756969bbb934e3fd0edd. 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/NLQ721700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0515a7d45af99acde02a0b5f833ba866cd95021ae150996c65d552305b8daba3. 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/TCADE1753749.
Make the World Go Round (feat. La Toya Linger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52544e24fea99e9aab6c58f24e704414a8108a93a7ebde614e73a39e1aa4708. 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/TCACY1707305.