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 0x0366886424c2c71aeb5645e2c247e37e5aa2aae96b85ea272f269f933be8ffd3. 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/bbfed975-7be1-48b3-a6ae-3e0d89a98c46.json and https://artists.proofprofile.net/proofs/artist/bbfed975-7be1-48b3-a6ae-3e0d89a98c46.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 0x28639f2380b73240037e11b76889176c9031ea41deb1d9ddf2e552043648ae6d. 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/BXG9S2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40133f31dcc55e09c8ba1a13c2d49daf4dc75fa6b131278a5321d72cb9a806c8. 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/GBKQU2071138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49948d4d0cf9886b02ffd8758e396ea0e96bb9f935e5912e38547766387f1ed8. 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/GBKQU2071139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90efde3cc47b3435439d40b996f9dadc57341de4cd14c8752e8acc77f825f62b. 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/DEE862300867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90efde3cc47b3435439d40b996f9dadc57341de4cd14c8752e8acc77f825f62b. 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/DEE862300867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca378b7988eb6cb38de6b728a91784a228faad0c64bf4691dff7d804a65551e6. 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/DEE862300869.
Oh Fortuna - Carmina Burana - Und3rsound & Marnage Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb47c31ada67e5acdc829a30dd50fbb5ffcb16f2f7edc31e58eba3410c1b56d5. 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/DEE862300868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e60d635264ab0c4ddafda1a6c12c351d903ec0f4dc764d858cc91b938a9d43. 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/BXG9S2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5e915a9632dfe832941ae5e3e1bd1baa0447a4e09adfbf81171c54c117ca77. 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/BXIED2300268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec11a2223007b71fde4eb05fb0d4e14891c8427f1e379636a46e49c42995404d. 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/QZW9N2265939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd8fd8cb2e973b34ac531d2766af79ba44ffdeef6fc5809c629aabf0b082f83. 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/BXIED2100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b4de9c272586616fc0af8d60e03bf4f9db90314ce98ab58a17d833ac7c7c4. 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/NL4NL2135870.
Star Sky - Henrique Camacho & Acquavitta Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2531dc40ee720d399ac4ab6593ddca601e98c4061f940cb2f66f636fe8dd68fe. 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/GBRKQ2001856.