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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceb1be9de8132ca79bd48cf90b730f668b18cae13d81a52c367ea6624c0e6c7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0421b37-8ed5-449f-b1fd-e339c18450e1.json and https://artists.proofprofile.net/proofs/artist/e0421b37-8ed5-449f-b1fd-e339c18450e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Copier: Music for Cedar Lake Contemporary Ballet (Remastered)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff739d2d308b3b83b41c104355c483b0da588c03e432e5563e2ae3d279e2b45. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:31Z), 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/USDNA1811101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edd49b7e56459bc03d802208c63124f986f31ff495f9fac74ca3fbeae388ed7. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/USDNA1811102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa850b9c61286ae727ac391bbca073cda4fe05b2c4be512e60ca8e0d83be7c947. 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/USDNA1811104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5de7033e2fc49a85af865c70ba0f3ebcc4c01e5f50dffadc65e1ea5f4912291. 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/USDNA1811105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f0db75e34ae2f02d634aab5933a6d8f5702ad70a3da5a5e4b10f04f4568701. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/USDNA1811107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5010f963ec49d2b667a5f35b695f760f6635cc45044695c70895fc84434955ab. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:29Z), 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/USDNA1811109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75f3b844cd46bb4718d837a0519637956490e7265a30feb712e9bcdf4f2fe83. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USDNA1811110.