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 0x9ca699037c82631a734ad8f06d1b6eaf3027019a11636ac1d35c02fbac94e8ef. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f7b55e9-b5be-4648-90fa-524dad5c3a9a.json and https://artists.proofprofile.net/proofs/artist/4f7b55e9-b5be-4648-90fa-524dad5c3a9a.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 0x438d519045338837e6faaf077ddfd0a0361476b85366e2a99bad6fbfc04b8bf9. 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/FR0U91501042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9f9c932438ed3bfa6528c43b86eca90b2d04b813e3b779975ce3a589f0e2c5. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/TCAFG2015773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bd7fdc5d78de3b8c33b16b92485e71719fb59f74a7bdc4f19ec5f912e33f84. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES52170806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cd32897149f7524e9181f866b535b6d30e2adad89c67c4911bb1c9f3051687. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZES52170803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe2dc6ede7d71720b85bd876f05a4ca8a348b393481ae0bf366e686df1bb0bc. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZES52170805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde65aeb8b8ed9407c15082cb7c83938fa58df4ffde4d7ebece89e56ed7930d25. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FRIDO2313935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1b780759431d9e108fdff05e540bc8defb7feed261e77b5a3007cf844afa7a. 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/FRIDO2313960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6379aff9bdcf98940ae475bb5f19a94474bcc7f4a1b098661f94eb8f98344d9e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W12425801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfce3fcb330535f14615681370b053de8807d8abd677540b5a014da3d98230e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W12425800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf6d52a88f0e73ac0672390aeed751325fa630e5cb14e6d34d4195feeb4e827. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/FR9W12425804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ee5dfa27a6c4b21a854ff0a83230ddbe8b8c311cb347bdbadd3b8840957524. 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/FR9W12425805.