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 0xfca89cabd404eb4454c76d035e0db40471bb0794c2352d07438f77799a61581a. 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/5eb360e4-60cf-443b-b6c4-6b0003234997.json and https://artists.proofprofile.net/proofs/artist/5eb360e4-60cf-443b-b6c4-6b0003234997.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 0xc97255ffd889abbfd37671f9d7e16088401f1684219be6cbee5c5a76d88c96b9. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:23:46Z), 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/QZTB32443189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307a1b4d44a839f9274eaf0dcb698b63b947fb0286af1febe6fc602dc96082ad. 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/QZWFS2479523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ccf6be1b708abd31bb7985f2004efaf3a2b4fcf6d733dd36059ab5beafc5d9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:47:10Z), 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/RUA1D2503470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331a3ace389cc5006fe4a4a2d716092b6907766758401c879b56705ac8e18d48. 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/US3DF2518752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf806258a7a0e8588c79f35689847c70ef476b642bfab5dac46bd36f22dedd1e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF2518754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f6126903625e045c1529e192a59bb1771acb6e2c61b5060c7313f33170093e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:52:19Z), 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/RUA1D2532430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6678af5bb4534da7b6e751c764888c11efd1778518bde2bdb29d0bf963306722. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUA1D2532432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4965de598af0e3f861b81ca104725a37e9db623cfb0c80829753cf1f1edaf41. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/RUA1D2532433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d2c15e3057a87980ac8c512d2ed03e04fa52c86f458d3b0a1b467f8ed00bad. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/US3DF2529796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f6126903625e045c1529e192a59bb1771acb6e2c61b5060c7313f33170093e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:40Z), 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/RUA1D2532430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4965de598af0e3f861b81ca104725a37e9db623cfb0c80829753cf1f1edaf41. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/RUA1D2532433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eba1431661a253a6c844ddc4ad9fa4d4d42cdff9ccf214413f94b1f12beffd7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:42:21Z), 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/DE1ET2383236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa79303ec858a0ae44c9c72826889c93e36f7f181af2f43a6044f8edbdccef1f. 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/AEA3A2571411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f5971b5b535ae4c09028c2aa835d59b65962ef81246dd74174ecb9c3334d32. 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/AEA3A2139721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66525723ee876c0980660c44994a30ce2f683ea42be75e3a0d0c7b7c020a8edd. 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/AEA3A2180257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed8d1f489884800b7c71841bc82c4409295d1756d3800c70c2b35897c274608. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/AEA3A2111513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148288beae883d2a51917335833f81964a7bfa4b382612fa35a54ef6ff7030e3. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/AEA3A2530867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb3727f7f41f819b93529a0434229775d39d59d005c1988aa681815fd160c93. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:27:19Z), 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/QMDA62503601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4ae80cdd91d1563ec61323a6590641aa19b4a207e31209c2a23b40eeb51b79. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QMDA62503602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6590cccb1c0304f44ac782ccb6a8cca993a1f742e39b1710a3a4c7c09571a17. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QMDA62503603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd5af8dc97d903c461e1168c43441ba1a0f48d7086f3ef67c1ecdffbf8ba37d. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:53:22Z), 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/FRX872527336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6fa5dd6b5a513b16e18caa44a5d8870f2961ef59d563976c6368b95cdf05a1. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:28Z), 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/FRX872527337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc215dce69d06e33cbda11c208fbeca3b962b4072ed0bd1f588357279aab2e8. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QT5M32535082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0242c10f818f4471d905c9ea4b1cb82bcad42aeccc44d67f61c1e01f71fd6e67. 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/CA5KR2497627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bfae0849f44ece3fc877ae3b772fc76d32a57047d11dc0c5b9abc1c5e5fabd. 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/CA5KR2497629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dc880f14f630bbf3d057270a12468ee000b9c02705cac77b1ce9a4139d3bf6. 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/CA5KR2497637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4adaf595ca93b91441639ca586292fbdd4352e31c96603a6fbcd4e9bb53ba98. 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/CA5KR2497639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e3a08faa35938335f1de7e0731c4ea180e510ea69397c8f94ddd9ec60915e8. 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/CA5KR2497647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf94e882740c01f87d119ff4fa2397f799233626ad0f0c6234991f70e0ab80a. 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/CA5KR2497649.