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 0x78dd75c944a97fbd1f0d24908d54c71c782ba08df382128ab0c46d6effdd8ceb. 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/e340dd43-c2ca-48be-876c-cbd43422c495.json and https://artists.proofprofile.net/proofs/artist/e340dd43-c2ca-48be-876c-cbd43422c495.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brand New Girlfriend (The Voice Performance)
Are You Gonna Kiss Me Or Not (The Voice Performance)
Crazy Little Thing Called Love (The Voice Performance)
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 0xe9746c510826bec3991722ee6931e502de2e896562a87d0c2cf6da80425d9c85. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/US6W31600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18de2ea3073215802427b70525536735a8e8163a3af0843ec36fa4af87e73b0f. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/US6W31600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc532e5da0f6e0003ca026b9a960bcbb30acf9f23ebe7c34fc3fa797c95f177d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US6W31600077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3e68dd9ff17c6cffe0e27433ccf26bde1fca21b71ee7ad83e2d3ad27608bd4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/US6W31600078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fcbd7554125a03874a315092f20f3e30b62ea91453fa1326a85282296d1b8c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US6W31600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cf96ac3f4af207cae7bdded7c6901f61d7342dcbd7a2aa13ed883f2fcbab96. 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/QZNWZ2168292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc60b7f1eb63da109271bb81ad8314d166b862d6883da457575a35e4c06305a. 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/QZEQU2300525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ce23a2dc8d9e62d51602638c3875e60f97f6b22ab31249caf12fab423dc38. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZEQU2300807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769a71c520c87fa0222991f73469aa6c7c1bd09aff25c4eed4e0787b20112dd6. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZYG82300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ce23a2dc8d9e62d51602638c3875e60f97f6b22ab31249caf12fab423dc38. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZEQU2300807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132eee7054ec97e884c8ac33f98ea1130a8e331a47486b41d3d8c9d990c7fb4e. 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/QZYG82300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bef1fc43328ef65b4d548743055c9d7d11a55978a9512fdc97c2479a2e0582. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZYG82300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921275108b63d3a6f0a89c45421fd5794e25682e457030a1e189c0a6ad19ca21. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZYG82300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6bc9c9d11118550f139d525a05e7d59d7745d40916e5cd19d2990e358bf3dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZYG82300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df9e7b61ea540a8ab55e27453d315ca4596df740f02e20be4e64354bcde8d7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZYG82300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5801cff1418f32045eb763f03d524efee855bbcf69d9c7400ee455a0062c9a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZYG82300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df9e7b61ea540a8ab55e27453d315ca4596df740f02e20be4e64354bcde8d7. 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/QZYG82300085.