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 0xaadb2029e3c577a94c1df9fd346ee618acb12d5785ec9a99cdf681a084ca2a46. 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/c72bb973-1580-4501-8705-1dde902b1265.json and https://artists.proofprofile.net/proofs/artist/c72bb973-1580-4501-8705-1dde902b1265.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 0xa61c27893b9014050948219e40db9e8885b9aaf5db12c8559417f1a7ba210f3e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP52478863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25996baffded3ec0d886641636d8e596f6c92e5ae5489370cf7e3515366a0874. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTAS2495482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff5df25bfb65cda319478bf2be3746ec341add191d141726f706c8c297a28f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7M2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3a43520a18ff1683d6e8c50c846f593d0afb557f61ae58c54a55da07a0e2d9. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QT3EX2448480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf108331f9215df520e28f8a4d7dc0e3402813cca252639eae864f6ef376748dc. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:49Z), 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/QZPLR2582044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97303e0d015952e810ec05872138ccfa650e55116b7962ac1311862c82efbc2a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:13Z), 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/QZTAU2585382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6536f3b79c9fc070bc95c4a4704ae19054ef367a23baf12ad0da4efc6cf6746e. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZWFU2596934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212b5db51d68f68509d62c81c1cc9a4b89982811044575a03f0e9d3f755a5e27. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:09Z), 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/QT3F92571613.