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 0x45b446412ce3a4f57574ada724bb5b373f8035cf56764a8990cb8d3d6d291720. 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/2932054f-ae36-4828-a6c2-4f5afec2cf2d.json and https://artists.proofprofile.net/proofs/artist/2932054f-ae36-4828-a6c2-4f5afec2cf2d.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 0x769cf47a70956922cf7049e0f472f647bd7805dae99dd5b627c9fcb8e36f8e6e. 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/QZNWW2431865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde9fcc0f37939fdd22f046c68e985e32646e58c910546e1a03a2e98b9003ae0. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZNWY2412094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde9fcc0f37939fdd22f046c68e985e32646e58c910546e1a03a2e98b9003ae0. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QZNWY2412094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f41c12752f1597ce9cba7f55aa7d639b74f465b414b92455460ca9ee953e474. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJF2512910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf656a79274cf5d2e2d67dfc8db55ba622acae61ed5cfeaa64644b5efb4b8b2bb. 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/QZTB72434699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36859ad9b7335a6a49d68febcfa5cf14532cba4e2ce926a95cb72b8dda494a0. 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/TCAJF2508528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97732193dea43331fb7662334022c909c22687a44207b0836754ac372cde671d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTB92303677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ab8396452d66bbf6200d19a7556e18037fbe80f3bc1a4cf7861b9616a7f934. 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/QZMZ92517973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce44f615ca231d6cbd086b6b559164e6ac1dfdd30cf6a310be49f0a7848ed2e0. 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/TCAHW2495615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566d849723ae224b90d6847491d21eb40d66bbba16a86624ba39ae9a8d504a79. 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/TCAHW2495836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f90841b991705acbcd3c3e6db929e497481732f84aea7c9fbdd1aeccea4262. 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/TCAID2403435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e481c9a1b89876c222d191f505e57ec5738232d9af56f8790ca603c39dd414. 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/TCAID2403469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4da68b993d61d76dd0468a635f2e111288f2ad9051421c01b05d1fdf4660ab. 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/TCAIO2440620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4da68b993d61d76dd0468a635f2e111288f2ad9051421c01b05d1fdf4660ab. 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/TCAIO2440620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98181cff9000b6a330290b087a30edd52d2778913f6e222ef553aa7f8a78fd34. 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/US7VG2505948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ea9f5eecae6fbb165d1d66d05197dcbc8df4bf0eb02a737035a68c369d87e7. 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/TCAIJ2457610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c9989f8d3f6b6241f57888312df5e49e668a2f806975d422f2c83567e28cab. 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/TCAJA2465833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1349e55713c56aa6d96cb7eacd26a35c3d8259762530a89ae4e95fa393c0cc. 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/USHM82547424.