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 0x5f28436d8e23fe11f04d2280df534557730e1779dd5ba5a665d9e48f5edde327. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0de2bc1d-b627-4a88-bbf3-038ace0f179b.json and https://artists.proofprofile.net/proofs/artist/0de2bc1d-b627-4a88-bbf3-038ace0f179b.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 0x963c32762f5d04f1def784ed60d5f52c23efadfc23cd788a0e30289375e7cf16. 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/NLRD52330407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6262cbdaae418572df586c7f5bcfce088698989b8a39820be723250d292c84ab. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLRD52330409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b78134713722904ebfeee2b9ca68f646dfa8c8412d8ad947c872af07563ff75. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLRD52330415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e94d8c95de10b5b3df52d2e3323bc7457fbe2262eb8c38448131c0a0ca8790. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/NLRD52330417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b322894fd734145c98054e859f5b5da15c9b65898cdd63b351c263c0d683c3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLRD52330419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2ad17cb3fba1cc97d88b5b571d10963771305680c8afde4aee5f7b0da289a3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLRD52330513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc266fb42fdacaf8e9743803823d8a8edfed960d62eea9485f9bab5ca94933bc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:26Z), 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/NLRD52330516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08742aa8290bf47cc17a20b57e56f847deac54f908ec91f5360e834a858c0827. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:43Z), 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/NLRD52330518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5179134d633516d6ec8ac2145e84fc956d105f19bae94bc2facac6c12eee5a7e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:11Z), 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/NLRD52418656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926d8bc5e5e431ae36154c9103c5cf94f8d453a9e0182b0c7b7e2ec68fd1fe0b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL3M12417537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae542028562560910549aa471d9a9cbc3a5e37d6edd45a7e90ecf9a709540a9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/THSOH2504732.