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 0x55137d4609b49b7268a767102f3227f7be7e8688f1953b6a5f3baa01036c7f0f. 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/36c2fc12-cf93-49ad-bfb1-422070062f1d.json and https://artists.proofprofile.net/proofs/artist/36c2fc12-cf93-49ad-bfb1-422070062f1d.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 0xeec51d5c7f9c6d25a8f5d1949703ebd0fd8c46434527ea30f6b65e493beb40bb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BR89P1500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc33820b117df696a050c3db6a8a67245af8312993f31b6e6f3390d799ce2b2. 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/BR89P1500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c081f7819e12f99f358402187a4c9be3ebe498038e320b6384a2fc2355bc63. 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/BR89P1500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a8c76d2742b057af9dfdda09c6e9c8f7697d0e96b0301002fe5b320c092d01. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/BR89P1500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dc8cd0b2bc83543aec5b17f37f6a702cb82bdfbb9cdffb6e617c463db4c8fe. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BR89P2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947d627a6c02359ebd48121df177774059f19d8817aeee797b6d6c92808da005. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BR89P2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5815c0ab0937075f602fef17ef70753067352f6b24a7dd111c3342d936aa38e9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/BR89P2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9799c81f2f1ac10a306f41645857c1f2998ed6e0562ca1c9582aeb96086d7f68. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BR89P2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b35301c9fb14342ff4695587a34807b6032d29cefdc03226fc3ed65a3851daa. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/BR89P2100023.
Passagem - DSon Music & Tancredo Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7290a49e8d2ca5a5240bb493766662ea9ed0222e9651e99e41fa4b3eab91eb62. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BR89P2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1899d37ee608ff85de27d32bebe91cc574fcadd82110c9cb0e65336e1ac6ecba. 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/BR89P2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb2ce2761322f7cffff71851646c04daacdb59f9d888f32da93cd0219503c37. 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/BR89P2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa861931124ded0ffe3d6164dc7cfe27aaa9c39f881b4228918b8d2ce200944bd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/BR89P2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8486c3d9b94a2c7a18626618b1d9557b8eab9c1543adadf8e05f60f18499f59. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BR89P2300010.