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 0x883ce53be793b1e207cc4e500bb6c616f2764894a755fe95797d2807aaf4c00b. 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/c9623011-bf79-4a5f-bda9-548cf3df1c35.json and https://artists.proofprofile.net/proofs/artist/c9623011-bf79-4a5f-bda9-548cf3df1c35.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 0x1e902408e4c6de8160d35c80ad82dd3cb8703d8a104054ec1741656e93cd8734. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NLF3Z1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78af622e9d8774c9fa40321802f66a7c422584cff49f0d711628d9e21ac934de. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLF3Z1500001.
Hoor Je 't Ritme Van M'n Hart (Boem Boem)
Mooier Dan `t Einddoel (Thema van: Roy Donders Stylist Van Het Zuiden)
Mooier Dan 't Einddoel (Thema van: Roy Donders Stylist Van Het Zuiden)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470f779600fe41078bf9ec7a927e8edb510ea6eea03c7c0fa2aa9eb028023557. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/NLE871728301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12346a345cb754330500cbdac1626e9bea06ac2b75fdec74f7e14566051853f6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLE871722402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a9e36e9a7b703541955b44884639e5e16dd7c4135bf5858f31963b665cb9b4. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/NLE871722401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79c30342a8b48156a6817f1744d4b21f201cc88ea1ae79574f130727eafc880. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/NLE871621901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6250e60954b7fc4b64124c07b4150bf56d895850379c8fb51cfb90bea125d. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/NLE871717101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6874bb940f354f516930748bbe28bc551486390dec98f7c28d9096d929fb57f5. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/NLE871921700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d959bc004c35767469660daae51ea2b7993e5c03b27c98b0d83abf70779a326. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/NLE872124101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf863b1507389ecdc7f1e402b83177dcd66ac24e3bc9279212f2aa629422c77a9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLE872165101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09d303dac286439fffbfc4ee59bf7e056785e325a24bda37d491b9e60cebd0f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/NLE872201501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcffb83a5fb399a7c6c4f7731934495032649bd3b48ebae1ad3d93644e252ae. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLE872216801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf13fd59dcad3eac4a8c66cd0877a46271850d8d070dd68c88fec2b83f6d0614. 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/NLE871936800.