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 0x8124eafd5a58833697a5498359f271a2305ab7a73b7b2dc15da0e8c97a753933. 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/3054446c-9c92-426a-a8da-0607d39c9bc4.json and https://artists.proofprofile.net/proofs/artist/3054446c-9c92-426a-a8da-0607d39c9bc4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Musicanabica: Caiuby Encontra Kasdub, Pt. 1
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 0x436d585e26cab5a9e8c62bbc7a2f7dedc934d44a83d234b7705d2b8b436031fe. 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/QZGLM1937392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956fbcc4f97bf91ea96466b7a501781e74fe55bc50525d14f4b1413f49df96e3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZGLM1937393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e0885c7dcdd3e19f984fb797b902ba24dcfe84737abadab6796b2dff66772. 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/QZGLM1937394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135c865b1487a19fbb9a4fe254b76b5c1eb6c556c195ca17596218e87b46fb9a. 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/QZGLM1937396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bfc4d1db6aae761ea74dfc4b008bbd92ec47d63d2bf0709c97fafd0202cb9c. 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/QZGLM1937398.
Musicanabica: Caiuby Encontra Kasdub, Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00101a275e02b63a4cbde8fd5583315e10411cbf0ea9e4ae8bd56059e3db349a. 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/QZHZ31958064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6513b85f077c01ad004be55c3e5a7802bb85de93a913ea0ac79135807d93dbab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ31958065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480756526e4a8fca1e849de91e5ba887f6573628cfad05337fd5f8466cfd9af9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ31958066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a89811f81373039d1f8df5f798f1f416a594de1fb7f9726980c71dba804352. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ32055508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516facad1edaeea4e1b7c71a953ea5940f5c1821de95fcf39899c7e3d11a0a39. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ32055510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd649470651b3d1ea463f1ecc6e04c0a1b2e5e6c5eb0ae0d58831bf01ec8cdaf8. 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/QZHZ32055513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b59b4eae527af7499fa47717ee364b4433d6f4fe6c1d5d80f92832e2863756b. 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/QZHZ32055517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c37f41b97e4ece2383f8946f9d238a4c7c2f571e2592683b0a13f919ff94254. 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/QZHZ32055518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86d2141667ece34717bfe7f10264fe76056d6e0be9fc1ba8c9b0a9a0fe50024. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXRDL2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe754f8aff176af5fb78984873a4e9bea4e39f0e333e38044ab047ac778ec9cd0. 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/BXRDL2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6181184fb08859664455ac8caae4df5bfc4f9c15fa75c9c3a598a341b8ed495e. 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/BXRDL2000011.
Kas Dub International #2 - All Time Lover
Kas Dub International #4 - Let Love Bloom
Kas Dub International #6 - Dub Different Way
Kas Dub International #5 - Dignitary Stylish - Hot Date
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ebdaa95b78bd11b83a3cc9315f9bcdde7be4e3d8eedf223174b1c869dadc89. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZW9K2435542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd77656ed9e3e4408d0c1748c2a68469a25dfb5cb7f9d144cf2c0824bd75b37. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMZ92594660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc354ec8673f438ba715b27c8a43e3aa544564f052e85cbf6ce408d17aeaee0eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNJX2500523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7614a89d8e5193a686fa53ce5b03229fd30e0e05b7c2bf5839f32a3cac25e3cd. 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/BRT0O1400012.