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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6749352b72c9dd74d10388f6669015fc1d52da38352bccbc9f76c085a25070a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77b1c28f-6e6f-4d4a-a0a5-f2242304d181.json and https://artists.proofprofile.net/proofs/artist/77b1c28f-6e6f-4d4a-a0a5-f2242304d181.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe746b3b277760369e99edb4416ffa415cb927c339599dd2a32a2eccfa3f3714e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCVC2167010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cabc591628b4e9253e4e8eb9ff966577cf0f09e30e75956981ffacea8b5161. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCVC2167020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe61fb8c6ddbaf290e5d685cc27071b96f9b050430bab16d7de207a147ee008a. 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/NOCVC2167030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0619ba2c7dbab081351618901ebb959c5b78e04e50b307c62e11b46ab41effeb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCVC2167040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e6033abd58c3cca185762f3eadd811f8dc78cb8fcb606a8792506ea18ed48b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCVC2167050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f55dc6b3f0de1a372307acec27a7f5066c0f866f2eddee187f413037b3545ac. 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/NOCVC2167060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f400fc8cbdaa45d72cab9446644b5d1d6ef10e43b558b8b4f7bf316b9b3827d. 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/NOCVC2167070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f550975ac42ab39eac59818e4f4c4e59eacd1736554dff991a7014b1e837fca. 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/NOCVC2167080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f560a07b9b6717271e865c87c1cfd8d54ac0ab2e56fb711f8db9baa102cda2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOCVC2167090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926d6c0fcab7d1272075013992e57fad4efb599f0038232794f26ac73dd93053. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOCVC2167100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb2fad0df554db31a5e24fba482383e57425d69828c7b31921211c9934a7cd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOCVC2167110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd9b97d7afa24f86900e1cfaa1c8b174f21116d7c44d0a94fca40f4062c5302. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOCVC1817010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad034122961b692dad5bc94e174fbac1e4cdf0b45497799c5a67606703ae91ae. 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/NOCVC1817020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f71176fad27c58f00fa65c9c821029a321dd94f8c9fd0c928cb7d6344772d3. 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/NOCVC1817030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e99992acb9173ea3ffdbaaddf543cf4cd9db632a3f7e13de63bac74e239d46. 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/NOCVC1817040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bb4d9718210dc8ccef275f7d82684482756a8e6f7ff0afe519df54a1dbb8f4. 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/NOCVC1817050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb04048b3a0a0529fe1a62d2743fcaf3be7f92774ee72e7a1a0aff1393df74d7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOCVC1817060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2d32f30fa4591ef73cd9c7c87c533c932d371b24a6aa411105569d6d0cc035. 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/NOCVC1817070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33341e9354b5f2aa5293619a89fdaaecc4f390d9c513f317bd0e7d8409e42b7b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOCVC1817090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6e9f8c5300662321626cd374d471a80fb7222bbdad9b081fe179df7b8568df. 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/NOCVC1817100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dacdb326c2ad48153eca583289fb164faee389d44fe404b4c4106ba5d50a4dd. 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/NOCVC1817110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd672f76bde830e63a3bbc4a70d08bb0ac87a87c97d53f92c1384ec4c096eb15f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:39Z), 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/NOCVC1817080.
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 0x45be543167bff9ed0a7ce563ab002053d911c96f28b3ca6193c59512a85f72e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOCVC2267120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf690a697bfa17e6e920da83db9af16c0796e230b87fa9bc596c248537fe72d3d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACY1796619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c0fc0f162904101e2c9d6e2e5512653aeec53340e3c292182596390c6eaf48. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACR1632637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cbf4d515e4af643da22b133e2661aac63dd232d720cd014459e5c1135231a8. 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/TCACM1688137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f7fd6f9130805e89c0deea839ac8835c95cf2ffd980e4297d6f93018943963. 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/TCACT1646031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f3463dd5c2e394d1eddb500ad88f4a946661bf9ddc9709e54511434f1b6f9f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACF1567464.