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 0xcfbe45cea53ff72fd2e225110e2b5b69dc01668e2ef418da7a68240ff88cb807. 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/247ba266-d351-486c-b20f-a80ccc09635b.json and https://artists.proofprofile.net/proofs/artist/247ba266-d351-486c-b20f-a80ccc09635b.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 0x5afad4e74d863c25b1a2fd99841192dbc1005021b3b011b023d9626f32eaf9e5. 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/RUA1D1923684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeafab1dd663b89e78dacce85fedaf9400d57d970f8edcdf28000a1f38c7939. 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/RUA1D1923687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037b167feca385983df2d98d3c01b751ad1abf19934762b5f2e35ed61821da30. 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/RUA1D1923683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f26a168acc68309be635167b3e285b7a8678429bef3fd33c2a02cdf88d16474. 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/RUA1D1923682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e141c358840c7d2a97724c70cfa66a4bf1bc6dd9bb278ec263552e0aabe550. 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/RUA1D2006736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56dfc13bad606a8f975f163e5240b21523a4f01532d308e7c6425794d3cfaf8. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/RUA742104804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1417d513fd2842586a0b01f0b259208ae8006dd018dce9bef462f0098017b63e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUA742109301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef60e521db55d791538d29188dbf494d06bf9e70f6072df6b6cc131221e0ddb. 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/RUA742109303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38466a9a3b0cb38449b2761bea1ee00aceff3e0fd51b27666b6bf6be1c56d37d. 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/RUA742212005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda82cec9c8c807faf915362f66c51d48d5b75e5f77084f97fc9d544c0a80a7af. 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/RUA742427502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0774913491bda6122f64abd74c0d0ba3a628d71f199c47470e222caa707b4f47. 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/RUA742427503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed308837daa49fd345d917453963509860bbaca63f5788c9a4531db360f6cc5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/RUA742427504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f329dfdfd78e115e922712b7be2e41a252aebd63ae0b497dd3a32dec0c0f85. 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/RUA742427505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcfcedc2053f5821f2b0d79264ed51303f15b1f5a8a2dde02706b70967e6512. 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/RUA742427506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e943d799588ff44875ffbda48925ffed36a8ca665dcecf4f4ebde8f2600d37d. 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/FR10S2243488.