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 0x0f969d6c1b21121da5785c662d12d00847e9d6072375a856d360173cfe1aaae1. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f1e6b51-4c5e-41e7-ac8c-3a09d537faac.json and https://artists.proofprofile.net/proofs/artist/8f1e6b51-4c5e-41e7-ac8c-3a09d537faac.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 0xa80d72ace0d2ed24263848cbd1fad701262598b1faabe540378a5022a4f0624d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:40:29Z), 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/QZFZ72317377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462f12550870bd9165a5df14b5cd2f61f69ca9f87e3764b50df20ecd9d39df4d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:38Z), 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/QZRP52400246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd24131e8038fdac7085493778c791e2d7b1ca1d43a624672d0fa2c18333ce8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:17Z), 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/QZRP52400247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f89800528af0217316acd81d300a6f975d488774e1af597b32ffa09fd17788. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZRP52400248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1484edcaaeb4a6ba1cda461cf4fffcf76d91cf8754685accaea334602651e7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZRP52400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608073cdd06a1d247a884579e6b5bdbda6f37931e474893625ad155a60061175. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZRP52400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5506b4c5feb361a04c24d2fdcd48541f9ebf75e64fda1b178268cfe685fc7be8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZRP52400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900910a22aa448f5b34c8b6e6a9a10e5e527e2f1c593c3ba479bbc2921f35274. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZRP52400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fd542a9a874951c3f9901238e546ccf212d7ba54a0ad662dbee0c183ef01c7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZRP52400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5453ac704bb675744f3635be210a8d15d9c81da353075560d65794fc2bcabed9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWY2548073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80d72ace0d2ed24263848cbd1fad701262598b1faabe540378a5022a4f0624d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ72317377.