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 0x4263c6338d4bf485aa684f72ea8218d2df6d880c9472750fc740559132221a01. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2855b9f3-abdf-4a14-9b87-567dd8942187.json and https://artists.proofprofile.net/proofs/artist/2855b9f3-abdf-4a14-9b87-567dd8942187.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 0x631c9918ab49d53905bfba25a89fd59ab28320f6fdd5ac472f0b839e85956453. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:28Z), 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/BRAPI1000357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db14ea4d23d2710639e79bd1c604bb9e3a7f7e89a9bf0edd955a77f13a3c6dd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM81575997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631c9918ab49d53905bfba25a89fd59ab28320f6fdd5ac472f0b839e85956453. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BRAPI1000357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e901909209a5649d179c488e48c257cc8ca40fb097f4549f60dce213d61bfef. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRAPI1000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bf6ba5125184d7a04aa928f0f81918f5ca656b283812117a9fd59a081b56ed. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BRY2D1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ba53d0fe800a944cbedc7942090279011a72a2a4cad8353cd2c1a05b785985. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BX3GP1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5227154b8de97fef4ba347671e277cf216568a3c665267501ecdd77a7abd913a. 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/BX3GP1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd066cb03375d0541e18260c76e08059395bc5e49a3cd7f45589d7d1a2c0af004. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BX3GP1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5941218ce47865266926c7cf5b8c9fc2c9e4126b0359dbd202ef98a9048d5a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BX3GP2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5483e105d5f0e7ad100bdf8c8d0fe5ab47d1b0470573f00d0df0072a0bea8901. 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/BR8K61600010.