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 0x54dcd9eeaecea22259105e93d2a77b999c92acf406f3964f004fd14296dfde6d. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f8db48e-978d-4091-93cc-9eeca0c790c5.json and https://artists.proofprofile.net/proofs/artist/3f8db48e-978d-4091-93cc-9eeca0c790c5.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 0x45bbdfc9a54ed3ca379005c0ba4d477166c596218c4fef36bbd6f1ada97fb1c0. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:33:10Z), 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/NLGM11701378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270e2b353146dfa788f1a36b46ecbf5c24d7c1d6aae84e5a30ace6f7ef88152a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:53:26Z), 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/NLGM11701385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fe5d8fabca2571c7e044e55d44c2f1f463272878d7170cc529482be1160b70. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:49:52Z), 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/NLGM11701386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1225fe8acd4916671b1642c2fc8c7ef93ce81702844a3f8aa0888b0cd6db5649. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:34:23Z), 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/NLGM11701388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae49866efe516b8e1ce2a1e73f9ba8f9265cd38e4a92f82363d68e6689560dfb. 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/NLGM11701393.