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 0xeb4a61cdf0b46f5a9ef6a61e9449eee107a7c9be3d84ea5c996d716272f2d231. 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/63030f21-81cd-4853-ade8-6622ff2f1ca0.json and https://artists.proofprofile.net/proofs/artist/63030f21-81cd-4853-ade8-6622ff2f1ca0.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 0x8a35d24b646cd7a2a0479b411d85ed730191719bdc9007ecc47e5b95901fd694. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/CAN111400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6fc0073d101b96502a37789617d6e2418ff6c2c3a5aad7ca802c8a8c97423d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAN111400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0d0b5d71539c6fe556bee9f873e5df9996e6dc769cd16f8456a901213a9452. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/CAN111500279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732079ee0efd153464eb8346cf335ea82baebe6e33d7c45d5eb0f940f4bd0330. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAN111600187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa327e69cf3afeb1ab966f65d3970f739afa6ef63a9621bcdf64332a33a2b8e06. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CAN111600161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a1510682e42ed52b79c967227801c1495bb3a24643d0f322e48ebee563d801. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAN111600165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1991c236490c4af388369c3660059756e11c64df75ebfd5a46cc6abe7b3c5f5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CAN111600476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf54ca0aa0cbe21e541aabb649e41e5ee0b6560ab8ab8e2d384fa29da300635. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:24:02Z), 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/CAN111700000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8f1f41c70e74c5770475f9f6c165dd394a06376a21dc80a70023f806d6a0ad. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CAN111700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9a7fd5362b339ba8336f8ee1c195366ef5a66b32ce2803d2dedb48dbd7ef48. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QMDA62275836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4862b28cfdeb677438c8869fc9121395284aec97d46da631d176d4e2ae1ee2a9. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QM4TW2388973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388bd3318fda7211dd9330146eb7460093b0256b0aa928cb0f4aeb32114ebff8. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QMFMF2391899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac50bc63c16a21eccd05dca59f8b0b5f3ac0f46a00e5586a96674d6188c33db5. 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/GBCEL1400708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e8bb920219e502508a659542df60a7937842a4653077e92abdfccabb0fe78. 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/GBCEL1400709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d3b899bf772a78a7d656a115b83037b28368911e396ce157a3076988f63bab. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCEL1500417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c6bcdc9644d777865d47db095698069ed31c0c58559a4b67f1d2549addda2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:58Z), 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/GBSZF1600233.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f4906f1eedff56b467041609f046037041c73332244ac3d0b4fa08c9e1922d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBGEY1800067.