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 0x64cb8c05f490c7c5d7c7b98c53ca888ca34dae611e687d22391c51544a88bf83. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e62a324c-8c16-47ff-b3bf-ca24f875e3ff.json and https://artists.proofprofile.net/proofs/artist/e62a324c-8c16-47ff-b3bf-ca24f875e3ff.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 0xfc52690390dd0af43d1d71150d8fcd5ad29e4be910d8557b47bf81976ade5e73. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:21:02Z), 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/TCAJE2551160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472259ff58de4189bf019424da03a93b20b79e2b71edd0925abaddde1e6691e0. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:43:51Z), 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/TCAJE2551166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7726cd48e67596bf2b58f84621f2bf1995890a6e3a3c8dda6e63759469ffe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJE2551170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ce93166d5eaa1e395916ac97d529ae0f46caff968518bc7bcfba07e4f27de9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJE2551175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24bb58e9a26fb6fb1713f41c2473455495b9637ed8d004703f833bad9a72555. 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/TCAJE2551180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81c14ee9cd4fb7519da5fea3a01b2d206854a572e2176eb8de78a7b1345a0b7. 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/TCAJE2551191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0606ee11501dc02593c046df4703d44404202ebf470ea66aeb5b69d7d7fadc. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/TCAJE2551197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8780b3e0a9bdc02776573f4dc9a08085df939974c34f7ceb2f1cf07ced1eab4b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:50Z), 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/TCAJE2551202.