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 0x1e98152e93ec50bee1ac6f7d682507894aa23bf933549d9f512777d0060bb1b0. 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/cd3733b6-22ff-4a02-bbab-a4e22b2cf3f3.json and https://artists.proofprofile.net/proofs/artist/cd3733b6-22ff-4a02-bbab-a4e22b2cf3f3.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 0xd603a83fa4cda5f2ad474667c9ec7f8afe6a26eb4db6ccc7f69cf50e1fd2ef86. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWY2459838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7b4bd683d721215f2ab52ed6d564a393d0b8b9690cce8783ab560baac327ca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWY2459842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067a0e3e0819aef22a3c1843cdf59f502043769ccca9bd962fecd814664e5645. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWY2459841.
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 0xb999cb46056fcde79be7ef09a929a9757a740f0c7f72f15a8b4677a35801a28d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2091933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482438905ac3d4d381736a5b01449c7a44890c463541af5a99df11a10bcfe2ba. 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/QZHNA2091934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8335394945ea3321b64a07a821ec3dd95bac34d28bd8ef085b8d107b1eb1c2d. 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/QZHNA2091935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3db634fd28d762703c0beb7d00b80db6268f12a017189665756b5ccae9c2349. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2091936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55163695946846d2d4798727be29ba5087958c554ecb41da07da31b7bb9b2c1a. 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/QZHNA2091937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777cba0edf4b418402de385a60fd82f6b6a17db9d19af4cb3339928c0a994157. 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/QZHNA2091938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc532bd64e1737a49ee9423a5fdd57ad19dada030f02dfdf56d08fb89d48c70a. 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/QZHNA2091939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefee9661c433088632f58f9f387b5fe0e3cdaa085e94ac3a4316ea90cce5c4e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2091940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccf547f091c5293d2e65f0b26dc51c7fe3cac75cedb70e453bc7564abdf988b. 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/QZHNA2091941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b0cafe558d737763aac15e8193628926bcb98fc18b507f89a649e7d5b025d6. 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/QZHNA2091942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6bd90a3730f5d1913402bc39a1d9264ab50ab9bdc430bb999b89576259aecc. 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/QZHNA2091943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47ac7b57e637129621560f70fecab6996c1291e8a38d963e8cde59768e421d7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNA2091944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd5867c8501f338716cf3a2e781033dcc51c56743cd6409f51159807e0e2303. 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/QZHNA2091945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ffcf854b77ac82833cdd91b4022fd5dea67f6733c929ddb27e2cf7ab595b7c. 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/QZHNA2091947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a56fd494cfe102d7de5c66723faae1412ce420b4a9d550a3daef5d8b00ab296. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2091948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dad32f01bd8ea0b4bc8a288c5575c50117498ee345215b019d2031d6fd2f28. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2091950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467ca7183f1d7c059b7747e442c6f8daf35b45ddf3db899a42d2cda1aa15d8bd. 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/QZHNA2091951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61668d8cc92f4ea260e90b846465b8aead2c4ba4c2c7cd85c6134d5484f234c. 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/QZHNA2091952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ae85b386efe2c142461657b50580dab6d633ef9032216553202ba6f933d0c5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2091953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dca286a889ac8d0bbd729daafbf9092f25b21322a812a795f88c5663a43f9c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2091954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6741cef444512bf72cc3c986b382b76721d1b1748f9a288d4156b4db414cd499. 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/QZHNA2091955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aee80f239072b9fa24e617a7fde5d83d329d254cda331ea4b06185a4278c3d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2091956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf11a6f133709158a93765b6100393ef55fb1aa309977774e13592ce05ddf9f. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZHNA2091946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bd2c26d0b708be76575a0b6d4f3352e13b3db16bef6e6e369bf41fedc04fa1. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QZHNA2091949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f7a59b56500166940e32ed7902f85cee72a9673752bf31c1a1df9bc52b3110. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHNA2091957.