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 0x685b703253ee3f0861c5a45c040011dd50e09f16626e0b4c7907808108f79428. 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/7b73c088-2df7-4551-8ab6-be4e0edc3b4f.json and https://artists.proofprofile.net/proofs/artist/7b73c088-2df7-4551-8ab6-be4e0edc3b4f.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 0x768bc0dd3cd81c219ad9a51671e7b7c98217e1dad3995b139e22ce75903f33da. 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/UKB991800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4bb6f1991b7b76f23b87303edd657f5726d92b39e8c56836cc75abe6a5ab60. 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/UKB992200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6745dca507720bfe45bec5e8ebbcd2917941cac37654b4ec1d80c2dd948b203d. 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/UKB992400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6853dc6f48929d53737659737273b488f1739c960bedd672286b14bfd817f6b9. 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/UKB992400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6745dca507720bfe45bec5e8ebbcd2917941cac37654b4ec1d80c2dd948b203d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKB992400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ba9a9db85517764ae9ed2c6c7b88266c274e79910252c7b4c93ed66d13f8e4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:09:05Z), 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/UKB992400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080be37e8fe45523edce4fa1fd392b4f3f7e5f5f8577e3394970c22754477fa4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKB992400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0694f0fa20da2fb88b52dee73fd5fc154b6864c95108bbfae4e5875d1279a533. 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/UKB992400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ec11773a236eced044833341603ea3c5253403f89a0499ce5eecbfa0521a91. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:03Z), 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/UKB992400010.