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 0xfaad8fd09a15f9b4169ba2564f4ff7206a4469479a8e980063eb0e29dc2029e5. 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/d54b6d90-70e8-47fa-a88b-e0e4b41cc6d8.json and https://artists.proofprofile.net/proofs/artist/d54b6d90-70e8-47fa-a88b-e0e4b41cc6d8.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 0x4fa5fd40deee80c4c6dcc2a63e301842c4a495f37fa53d25bf8437abe3e61579. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/IL5842133975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08de26b727a7b4e746453817ba36c2f26fdd991f0ffc82fe9a7a4ae603cd66d0. 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/IL5842134041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d039b7f0361f3f59a2fc357bf9e2e2595c9b55a7fa03732db4cd4b242c8e60. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:04:34Z), 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/IL5842239694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f8afad04990fd6fbf2dbac2c6698fb34a496b4c9459278983215da57691348. 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/IL5842341622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5582ee8eecfe1de5a702c5e6d5f33d89bce4f5162b45d289611b1645890e17ee. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/IL5842342640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edc649167de8652c65298bb6352234e86405505e47324d35609aeef933ef824. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/IL5842446333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6541f8b4f9f992c3490fd971c56bd7e0a420667d90d60c9687027a3246d728b2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IL5842446334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ae12fb00e38edb391c2b4fba9618c6463157584e8794f1a14311c4e0990623. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IL5842554614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e48d67eabfc16d38800b6038c1f353af0efdc2710340d4cd91e1375e345ec0. 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/IL5842029324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb1e3169c7f021710d87d756d5610d383cada6fe861abf2e4953bd7b68e9355. 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/IL5842031067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e48d67eabfc16d38800b6038c1f353af0efdc2710340d4cd91e1375e345ec0. 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/IL5842029324.