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 0x312ddde3658bb6d37a383b6bc56b2b93f2e8ee6818864c8239b6a6cd6a7dc7bf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0253a2a-8d0f-4145-92ef-304eda4414d6.json and https://artists.proofprofile.net/proofs/artist/b0253a2a-8d0f-4145-92ef-304eda4414d6.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 0xda51eb26f57bf42dbf91e614eaf2ff04f8bf67401792c4a11d851ad353dfdab3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:59Z), 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/MKA030797031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a6e02f4459926e957adba3830aee9bcff6316484966934bad912870b0c9a4b. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/MKA030797032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4b030af6a97a55d9fea37d925b8f003d55cbc5a95cb972c26687b9d951a56f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:35Z), 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/MKA030797035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48987640fd6a7366d4366afedb86a2862b2fe5b10fd762227a8b4569e04f6d7b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MKA030797037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eebeec08ec5358dc777f493e4acf28c352417e08bdf950092d1d24afafe769. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/MKA030797041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ce8d614ad51a28eafd510d1de1041dbc69259c73d1f4031ac4328ba29807fd. 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/MKA030797043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bf05460360645e8855fd84ef9df46465322df09d1773858fbaa650028ab0dc. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/MKA030797044.