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 0x2433b6a508a31787ce9a32a66cf76cdba44683f115dfc9f916265d8ecb5c04e6. 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/bd49293c-3713-4746-aa0e-90b3e1244dc9.json and https://artists.proofprofile.net/proofs/artist/bd49293c-3713-4746-aa0e-90b3e1244dc9.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 0x17f21808a07ade848de908d5faec2a181613066b3ebb399df0fdaffd343d81e8. 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/US83Z2201963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df67b37f0b886e3cca17886800ff26b60fce94c4ea2cfd774acf86c76cef4b9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:49Z), 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/US83Z2206780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6950325cb25fcb7e653154b16b8c01263370ef5d6ade478c5fd54a0a43081658. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US83Z2218091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bff20041e85c5adbba9f120e1d26ac9d8871aa010547807f2f0ede77ba9f2e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US83Z2225250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a08f93b967e64c6faebaef5bb2d5f4a6d8e5fb48f6d09ad823cce4a02e2de. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:55:42Z), 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/US83Z2228096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3ebb7a54f141167b2f25fae6b75c340f9441a81ebdfa86f852031429d7bbe7. 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/US83Z2229521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8c3aece9756e83f1588a5c1656bb380f1f58d78ee1bd1f3c28637e88e22d39. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2321133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfbdc2b607d0d55ffcf0be56f9b5f0e765d43f26d8f3587c3a239fc9065ed2c. 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/US83Z2346849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3d7cd5aa621abff21d7ceec19634507f9198c1a4fcef989455ade6b00e2f12. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/US83Z2457715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0ecc193b8fdd365dd6871ce029eb219c0f933f11370005bb4c47c910b79109. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/US83Z2482734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56c7b1eb84c86196b72e65b14c686f4afe5a7f85ffd75e0ae597ade30c7b4de. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/US83Z2527163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b2c2a6c1bc1e757ec190375f6948aeea2ed216a5a3f7d28b9ea2bb90c5ff27. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US83Z2534719.