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 0x9abaeddb21f3858a48fdcbe41621133d38b4edffbe28e639ebe82bf7680028eb. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c07d13a2-2d1e-46c3-a750-8e2d705ed411.json and https://artists.proofprofile.net/proofs/artist/c07d13a2-2d1e-46c3-a750-8e2d705ed411.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 0x2c3229a7128a0819f1e44670c199ca1a51b5ff4931418e5948fbca959741b8b8. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZMHM2266505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeab7f022c309f2514b3de6ca699a7859d4f44296e55cabc4b3b58387f06c53a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:52Z), 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/QZS662271584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9275977437574b1de68f7bf050211c14a42c627bdfd170a4117aa12bed376a7b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:17Z), 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/QZS652261517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf24e15f2c276a129305565afd06ab3acaefc26e8e32f2254891a21a4d49b7cb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZS662293165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4239f4cfd15f1e7ece2f1a2b46949ae59ec959f9d5f9476a11c71c4a954e4b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:27Z), 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/QZS642242302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69fdc829f6f5cf08a70c6c9dbb854a938bca85b94c4e7e97b34437ba3088c2e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM42K2207942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c8c38592c085371896a2eeca8f144d74a5557a6c01882ee9c3a7e2bc75aeee. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:23:13Z), 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/QZS642201953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08074e29894f529538467b0361d8f8cc291e1b7ae0a0877b848d0c636578e4d9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:01:24Z), 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/QZS652286971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5637dc5134bb0d5a351345bbe840faca3ea98a0bf6f5a652bea085bf90b9e7bc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZMHM2205319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c7e94fabae6d4e63f8e6be5eeac97583def1abd4907b0fc402434b3ab25ef1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZS652247996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a78ee6289c68c57f6440549a2f17476a68ec8bd6681681580c539c72c6bcef9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:38:19Z), 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/QZMHM2232386.