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 0x7b9221f19999371644445e68b2df67f5dd0d209747742d447236619a29c1a953. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cca53e2-af7f-4746-8298-c9a2383a13db.json and https://artists.proofprofile.net/proofs/artist/3cca53e2-af7f-4746-8298-c9a2383a13db.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 0xb02e7fc5d32f4ecc3fb832ff23faad73a7d9052dfaae19c31434e4705d8b9e91. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZHNC2347483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eed88ac4a477db0fb8ed005c7688a4101e8bd93ed7ed39d6a286153149c1d49. 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/QZK6M2318084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bbdc53ad1df4b6732ee6b2615d6586ccdb05d3b0c18152cab670d850578c53. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWR2387988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a1fd53575511aef5319b67c550cd5613525f61718a3605c0cd6e07699fc413. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTBF2328651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637b921de7df0c47b1660e5b9da55617395b1c3c869685e377bc760b3ae2ab47. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZFYZ2407364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c58a7a5b3cbf3726d073f705312db6934ee0f3671733791bf3cc3505526c512. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/DGA082481327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636c80921615583bf329ed3762ac4e2d8972becfec5826a6b58b81f3e5f8dc90. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA0L2411034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dd9828aab9ed41e915f8a3b182bdaaafcf37b58617e4ba0d0894d4fceb43d7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA0P2437103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5ee8cf3966a58f13252b33c251dd8a07bae1bf922d58ced5f0eac562f93479. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/FR59R2577191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969460deb822d6de16c5b7331e758ad576c8b8dbc80089aeb6245bf7ad4f6506. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:39:16Z), 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/FR59R2577193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dd9828aab9ed41e915f8a3b182bdaaafcf37b58617e4ba0d0894d4fceb43d7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DGA0P2437103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f223eed3c607cdbad9591f3d8cdad12380d6b3b88bf31f63a59d2442b37274. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR59R2577199.