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 0x945eb4f4a12b0c5ae5ecddc42345fd20d44389cdda1819954291c2eca3149c44. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d754ec0-63ce-4f77-b345-fd205bfa8574.json and https://artists.proofprofile.net/proofs/artist/8d754ec0-63ce-4f77-b345-fd205bfa8574.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 0x25246ae1e4b1978a4e5a6bd8f3f37a098feabb3f06567028d78e69346088117c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GB5EA1600577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982ed56f47fc3fb38eff0c92621e671b1e3300faac7bc69b7e856d36b9956431. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BGA471801319.
A Cold Dead World, a Dead End Tunnel / Cut Dead
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688c49926ac2aaa91a0d5da0d66e0c239c91d0452e7aca4e324a3c8a29b8010f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/BGA471801320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bfad42f0f1eef4c95022ef79625afdee368afaf967e501d2095def3407f862. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/GB5EA1601511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75290aee94f2d452e32c108dfff0638337a84c441964d042000074ab6834fe5f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX201828997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df43edeb3cb4c3cc85548f669fae6ae1ca0c4f668f63d89432f17a6f58a4698. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/FR10S1907727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fd6c585fb5ddcae6cd1dceab33a555793dbd279748c8bd22c0bab475f9b421. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR10S1907728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd06fcfce7db5ac7dfaf53ff49637e36b663d9ed9b6275bf11bab6f20a32220a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR10S2139447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06fbe11592a795b0dffd1de3682d36cc55e6b159c8703887fc556c5759477c5. 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/DGA0L2413366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06fbe11592a795b0dffd1de3682d36cc55e6b159c8703887fc556c5759477c5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA0L2413366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff6996ac716498ba306ec9504d8f93d6205e1766f1b75bd4e382f7f4a2af18e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USA2P2471471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7077a669e289b2d989f41a051c18226e7ef17bb460438923d8cf7c0882bbe44a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2P2471472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06fbe11592a795b0dffd1de3682d36cc55e6b159c8703887fc556c5759477c5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0L2413366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249070226ab210474f6a7b6d7afda46d7445158a44a323ca94a7c713d416f81f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2471473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b57b8d9372542f54f1b4886090e6ce1baa11f1c77f0abac3be92866cafa77a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USA2P2471475.