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 0x249f8b20ba5c80f61ec72e376d6e64190cd6610fe83db06ed86646a71828d4e7. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b4fffb1-5f97-47d5-a780-93e4d60f4f0c.json and https://artists.proofprofile.net/proofs/artist/4b4fffb1-5f97-47d5-a780-93e4d60f4f0c.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 0x54fb5be50238d97aa09031ae66b1992368696e11be6a03dee455dd51a5b9d5af. 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/ILTON2506507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43df110fb7d3ac35fa55df01080080c967d101de8496eb71f5728f42bb09b2a5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:59:18Z), 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/ILTON2506147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6992d1183147d8a6a6c2fe0c41d5d2960fc220f9106993d3c615d35f9be864. 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/ILTON2506146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8d15a50f0e2ca2849c91a7343df421283e50e2e1b87a9c9610fb6f53ebe99f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ILTON2506508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af8112498ebb2ea3e547d55d9de35a44c7382361c514b9e8f94c47486eefd0e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BCSY22500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44036b2f1dd96e249a4e34e7ee6a3d7d5564480df37cbabca54247051bb230b3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ILTON2506509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5c6b76b344d076de4e8ec1b7b17145c602d961869ff25f834ecc9acfab52f5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ILTON2506510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd639a889b53da3512e0466217a1a7f801a7c5e0544e0d334ddf9bd9e71ce5987. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ILTON2506511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8a95de7ce7a8ba393c96713b3c824ccfeda09d6c7bc4e347f90afa028c7108. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ILTON2506514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fb5be50238d97aa09031ae66b1992368696e11be6a03dee455dd51a5b9d5af. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ILTON2506507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43df110fb7d3ac35fa55df01080080c967d101de8496eb71f5728f42bb09b2a5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ILTON2506147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6992d1183147d8a6a6c2fe0c41d5d2960fc220f9106993d3c615d35f9be864. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ILTON2506146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8d15a50f0e2ca2849c91a7343df421283e50e2e1b87a9c9610fb6f53ebe99f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ILTON2506508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af8112498ebb2ea3e547d55d9de35a44c7382361c514b9e8f94c47486eefd0e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BCSY22500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44036b2f1dd96e249a4e34e7ee6a3d7d5564480df37cbabca54247051bb230b3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ILTON2506509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5c6b76b344d076de4e8ec1b7b17145c602d961869ff25f834ecc9acfab52f5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:55Z), 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/ILTON2506510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd639a889b53da3512e0466217a1a7f801a7c5e0544e0d334ddf9bd9e71ce5987. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ILTON2506511.