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 0xe0d0cee322ec4a6875cd6c2c1ae2ee6256d8414c8c4ef55d9178816b77f6ff4c. 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/619412c5-de66-40eb-98da-17f6fc6960d1.json and https://artists.proofprofile.net/proofs/artist/619412c5-de66-40eb-98da-17f6fc6960d1.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 0x06f59c87588be01ef324dec79e32e6202986d656ace906bffcab1c2a67b0a1da. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHQ2362265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef6e27da0a7048e3cf8eecb133d7aa3b9a8070d5e0e87b1554d26961cf59329. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAHQ2363157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf999cf26d26fd9043c17f380b5f5f495fd671f8ea977ada93940b51c83fa11e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:24Z), 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/TCAHQ2363451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a11c6666e74b3119cf39f9b4c8a925991f4b2c80a3cf594209e481dcb7a614. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHQ2363357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56a939ec009c5d51cdd058898e505e4ddd6ad6c8380cfaf3ac7e769dcaf04c1. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCAHQ2363057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd399e3caf8b94e12d8036fe4e5bbdb42d91d3627b5e4abdd09695fb8c26f0085. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:16:14Z), 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/TCAHQ2363440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf52d4bcf59489d6b4050c50c06ce1a4fddfe58508f558f0da219a2c85d3b1e2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:42:49Z), 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/TCAHW2498590.