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 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 0x0b0507e1f144fcaba48f1bc1026d4a220c21e3c3d521837d663889ed469e58a3. 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/276b3ac0-6a74-4d59-9526-b46509c6cfd1.json and https://artists.proofprofile.net/proofs/artist/276b3ac0-6a74-4d59-9526-b46509c6cfd1.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 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 0x583db0a68bb2bc0f6f31727ab0ce912253c9bce19a21e6052b9734d9b184447f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DES372000263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12552040185e282365d751d07b6f3d4a08d05bab286f530b270a9e00dcc784b6. 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/DES372000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed31b6c2400df5fb9fc01a44651363561810d745d2d1344a0f1bb67deebe974b. 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/DES372000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3928066fef0c1b715ebad7251de3cf96790d0092570e4533fc70fd4569b53d. 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/DES372000267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f6359763ac377c0bd9aa4da70c40a3b23b6d56e70671e7577929297d008e0a. 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/DES372000268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0228cee4b6a95ce0c36ade379ef6a60b3c6b08a49d41c395ed52bb585f5e7a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DES372000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcdb707fa1b496f245f82f6f59b0270f62db4cc06207e2eb28fb6e8dc465a5f. 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/DES372000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66088b921b4fcadadd8bcd3d4462fc20cd0301975d80cd08a610d575568bbc07. 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/DES372000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a304e7e61ba282b684b6a0e8f3ca4fa9fea874d8b993c4464054bf9756ff8b8. 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/DES372000272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6971cbb92a20b6c814d907de6fd1a0b13e428f0e3536c800d434880ce7680150. 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/DEZ901400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0264ef3f58614e1ced86e3954b0a6d5c9dcd9d9acc0a7d3ce988a3f03062c035. 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/DEZ901400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1d4688c256df9dd7b5f89d92ab5e9ee5e7d3e6864cd9f7ba86eb7d1274b7bf. 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/DEZ901400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caf7c9eab041e40244f44368c53f1fd12499e016b7d845863e178ed6149cf17. 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/DEZ901400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a882b68c8ceab4c3eae1b4a631650bfc56c8c92c5056ae82e9442cdb25a91cb. 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/DEZ901400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a1ccf6d50a61dd43403db5688fbcb0ba8048341a8cf7b13a39ca5c155fd79c. 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/DEZ901400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3ca2195f6f4f8478979f6dd88a906da4edd5a9b79a5ea3e72219001ffd413b. 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/DEZ901400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b4abb387070548a39940a7fe5e97435cc9169eefe536992b906958f1dcbbac. 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/DEZ901400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c050b45b7c39fe36a348b06a5ac881a627a0565d8b6ac89c75720acdd7c065. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZ901400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68ddd51873c821210f449b70d1839afa020f47dc2f830f5672c2a59a2afd495. 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/DEZ901400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a304e7e61ba282b684b6a0e8f3ca4fa9fea874d8b993c4464054bf9756ff8b8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:50:04Z), 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/DES372000272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423c1d3b6c12a3b5362520f587d6d5eb50e14921f0fa03f4ea1b918618c0522b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEZ901300946.