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 0x95396153edd558ca4a6127d537e83a5d4999fdb8b9cfc1ad50c8f5c02d5ff82f. 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/56f7b9a9-5959-469e-b369-d0f43a1c1e06.json and https://artists.proofprofile.net/proofs/artist/56f7b9a9-5959-469e-b369-d0f43a1c1e06.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 0x8ba96536ec313534ed4b7e647ac3ad0e2f031446e40a42e8b19bc2444e216cf5. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:47:31Z), 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/QZDA41837685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950a6118a8b51a573429032cea7f85bdd50e9a464d12b239e22b3c9d6b7803e1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZES61857967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4224a5127886dd9d4d05a9b13afa52a5141eea7dc0d73589c8d2fffee11c52ab. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZDA62038909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27643830e903dbcead68e26c0c6f475253aebbe4e04fa876d33e0d1152bb3353. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:00Z), 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/QZK6K2101103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792d29b4ab6e1e33b3a2608475a11c59cb3b62649a10ec91d2c7fae61c84d9c5. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZTB62394676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f78b328394ff4ef017c3916dd3ab5ee74bbe65430816b5e39b25dececdf610c. 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/QZTB62394677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2914aca62b44ea27f6ecd94df0e1a8714b997f2d4ee6fd96a2f3407c071365. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB62394678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f784d291586ee42ce8d7eee76a42d3a3265d813f97a3ceace5a8154b6f42a50. 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/QZTB62394679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a646ddcf83d55a2b3d2bcc08d81f4308f2bda3dcc4f9570efd869842e346466. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:10Z), 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/QZTB62394681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8c60f14555be707fe68fd128a84dd1433cfe7f2ae50911fdc4884dc450e55b. 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/QZTAW2414396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3496b2e56f5e4f4069d6bbf62802e40beecc3b7ed8254a3a4757bfbf626bbb9. 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/TCAEL1903343.