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 0x9fdc984db79ba2fd0d0d97201d1cfa5557cc5a21bae69bc5a945302066c5830d. 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/4b099bed-1e22-46fa-95b5-7c7347f828fb.json and https://artists.proofprofile.net/proofs/artist/4b099bed-1e22-46fa-95b5-7c7347f828fb.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 0x6383ee9e833ab628f278fbe46e0dc18126e669b8a49c91c75bc36e717c2ffb53. 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/TCAHC2360725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9d3ee56779656837e2ae41507465572bcdbc208f47533df160da065f9ff3b1. 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/TRCAE2400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324ad7121e1e6858ec280234521f611033c3f5707b028b832487d40b9629123a. 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/TRCAE2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81993f2e4419ea93771b0594101d2842d9454e31f74a9139cb4e5f61be392cb5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TRCAE2400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf031dd0064bbc367c91873e08d4a2809afa6f0861b3bb66c2ca92dba2281c88. 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/TRCAE2400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda45f1a7cc11a1be859d922a76a9985091e8b9e3d8348ed1cdd733e1d03e9534. 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/TRCAE2400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd15b7d5820745a50b49494532d8812d87beea46f8b01f604d5929f0fd92eee. 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/TRCAE2400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c02efb8329547a6df846bce4139c3b66b677a837257cadfa5dceef9b1503e5. 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/TRCAE2400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdd9b9a21e1701a9293abec45585064d9c471c3ec117738a8024b6c56beb424. 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/TRCAE2400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff8c11a6823a6ea32b0773fe16c445644c9464088a759107985fd8cd346adce. 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/TRCAE2400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6259f69f59dee15e044c7e2628dc1681b4b61054ebb15a97f1de3f6d8d1268. 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/TRCAE2400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49253600932e0ceb87831502c8d705ae93b1d3c71f23760f20ea460279a2cd8. 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/TRCAE2400242.