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 0x732e254090337dfd0146c0f3fd4d59d97faddc5f923bb5d45537ae1d6a10f680. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8fd736f-0a66-4a97-a34b-96c507840fa4.json and https://artists.proofprofile.net/proofs/artist/f8fd736f-0a66-4a97-a34b-96c507840fa4.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 0x21afd792a74501b8f80237f27e7cb3d2c46867d9aa992ab468fbb2852df851d4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USHM81963854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dbe4f9bf70a19b3f85a2053fd874e6d217a7eb3f9b288f0419dbd122446798. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM81963855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45ddc7c8f145c8ed838d7715869f0d370fe9a68a6747ab1e7593906e65d6062. 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/USHM81963856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17096256abb10454401a4b422661f0dc8585e6898e8eed9ef02f345d6451ec12. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USHM81963857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdbf797c80df76d541774e227c33363a82c482abf3e00998c2f109357b2f34c. 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/USHM81963858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbcdb18d28e27586ca563489c87ed3cee0303d0714e87aad44db8f587efe73c. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/USHM81963859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69cbf42e00deac50e5d8895973fff844022110a0233a30efaea31fd7d951ea5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM81963860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e8ba672ceb34dc8d9bc5e28cb517d7da42095bc39e92a7c3483c9d35f2f612. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USHM81963861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13e00eace45a96545b69f4bfbae7a1169b5d9d2c379811c1cd1f5c03480fad8. 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/QMAAK1979498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c34a5de9b3787e2872cd8333bf4626b0f34b5cbb17669734c8817635c1579a. 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/QMAAK1979499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46129c4c2fb189b27c685500e7b1d04efb764625704486c039f0e9d189520b1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMAAK1979500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3fdbfdb4434756f633bc2b15500077019b924636fae58fb65ab2e566a016de. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMAAK1979501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b5ef200a71fc0f4e29c7e049132806e726e9f66e76df6f198773e6c46353b4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QMAAK1979502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c05992ad90581d34a4215185c260b46b64148db9e8dac2ca35f8a31a98086f. 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/QMAAK1979503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71615856c3bab73c14bd97221e1f648b876f6b19da103c5a25f512742405ce4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QMAAK1979504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aa47eb8a3697ab9b24385d258f8ee502af0defc4ee4cd5b51c9b7cbf5ce320. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QMAAK1979505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8296bca45c77e3938b9d069e171605ccc9d0803061cbecc66c579233467b4f66. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMAAK1979506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987f80751654888229d66b3a529c54609677aa955266205de5d94dcf2e4e1e8c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMAAK1979507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dd8b89936e3eddad936f88d16dee3df4734228c122caaba87d6c01946e0493. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMAAK1979508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5232b223357935b34cd0c957f3e4a9af1ab4d6924b9cf2d04ccba4e7cef0486. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QMAAK1979509.