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 0x4fff8580ef5a018f2b267b3fb05c1bf7c81f9bcd1e519f7a93cfb00e08f8c990. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9704ebdf-5b16-4dde-96cd-4dcfb17005c8.json and https://artists.proofprofile.net/proofs/artist/9704ebdf-5b16-4dde-96cd-4dcfb17005c8.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 0xdcd3e3fad90ec8cf67cb9eff833fe68fb71792710002f05d851fb973dec2826a. 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/QZGLM2238685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d89a7c25204227eb1391460b91ac2eaa83795e7ccf330fd41360b9259da380. 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/ES75E2302885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1872a3d5b177e5d007804fad13d930424350b9703fe6cb41e5a4f41414092169. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES75E2304866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a692ce225e4b3431b09a3b9445fc50d0a0e802a1b1ecc8dade4f447ee8490b. 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/ES75E2307107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9216864dec9eba4889ce8233ca6ec1cc2917377c074fcd680efec5ac7f24f4cd. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GXD7V2248711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af89706fcd240d98e5ee16baff53a77c5ec060b68c5d16ec68f0a2018d12d84. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZG2X2413589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f95fc3cb8730ab8da4b6a586514d4f1fb0f1213eae89ca00ad23084cdf4b7e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZG2X2414228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a142244990befa34afc0c86c7c0b2a22b499111dad8bd8d9da834158819ec3e. 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/GXD7G2551323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c8271ac773b10acfb5fc6a2b2757cf460654dd4a2137cd5875a01c3dfc0052. 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/QZG2X2419365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b47d2fe7eb68f0529b92bb5994a7639246bfc4996702a33700b4a583e0b3f. 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/QZG2X2420886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe688b54854605bf7c3fb56d56d661d3236931b881afb69e618976b41ef123596. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:42:01Z), 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/QZG2X2422099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789928d6e3d113ea8571d593e57f204358c61f093cf89e181e3f90ba0d194e92. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:23Z), 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/QZG2X2500875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf06744b0af22028a7444d1b872d046ac77f036bdddf76f4855b994c70a21ed4. 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/QZG2X2501984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b3544a6dc45595dac8b456076f01d72edcd0cd7493e8fad5dcf812236f617. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZG2X2501985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f550de2d934930097fbaa9d34599f79945df5b2267ea209b4efbdd07ec147d3. 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/QZG2X2501987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc03f4c82458d6f55b61652002708a60a304130fa669a11e9fcd16b8682eee1a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:32:31Z), 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/QZG2X2501990.