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 0x610e805ab4c7d918d013d873a5e446272449c6597926323dfddda5e8f5d6e244. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4903c0c-938e-4127-860c-2870cd96d9af.json and https://artists.proofprofile.net/proofs/artist/f4903c0c-938e-4127-860c-2870cd96d9af.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 0x680c91fb0141e25af0062f438ea44bc9964c877dfac9d6a2bcc79010535bfcfc. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:37:35Z), 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/TCAJC2455258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0700088cf5b08ba058f2398a4ef79667c3c498b42bc632bb5a9a3beb6da859aa. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAJC2431403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dac5b2466cd06ab0a527987ec0e8a1bac0c8eac221624b990f9dca7b78c60e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJC2431430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd1d29d172442d90f789d6085f82a2e164351c66f91b9fb78013242e1c998bd. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:38:31Z), 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/TCAJC2431475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077de971c31ecfd181124e2dbd58fe7fd9c808a630cb7fdbe0197721cc63bc76. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJD2431489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134ade4bc5f39363239252c7c64da5734d914d63fae5a8ceaeefcf38550073da. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:54:14Z), 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/TCAJC2431514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9438725e80b256c82039d4514af9c850b88981bc973769e3655c2fd93ae1fbb0. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:58Z), 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/TCAJC2431539.