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 0xcb0a83734ccb2755320b2e2f3a500f27763175ec99cd92287f375f18730797b8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2eba087-5532-462a-b92d-6fba79203ceb.json and https://artists.proofprofile.net/proofs/artist/b2eba087-5532-462a-b92d-6fba79203ceb.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 0x3d16d44be9d6e5126f9b951c891792e7ebdadaeedb9f842b914694ad35a0b0e4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DK4YA1816001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044925e079a32d84d1ebca5738b2e8a988963a315e78b573069f3224d65cf08b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DK4YA1823001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bf24eeab8d4592cc42c3a00b26c96d5908a1ad6dde1c954e9ba8a3dfea1bec. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/DK4YA1901401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819c1c8924f1eaf584dd7df98403a909d3c7c26786cbb46285c3dca7521b120a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:25:40Z), 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/DKADG1900417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66707f441aee546dae2208399b80e709e930b2982f1db59c4c72a3c45fb81a15. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKADG2000954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f941fadb4988c72e02ab66c933dde1796f7eea1c5d32403d5f4b6f7b45eb60c. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/SE6QE2237369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179be3c37bb8a9f0acf39ec7cdd72b529efe2b20968053c9f7d088b50cbe483b. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:36:34Z), 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/SE6XY2301478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a7e54a73b8eaa0536ae03036ebac935fe00d620a859e3bea350901861f305e. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:30:05Z), 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/US38Y2528811.