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 0xde9ca3bf4775c8970e218c6ff52ead5824df24ae9e6cc2ef7e75fe202f0a98e2. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf01f69d-c356-48ad-b642-e15998e8350d.json and https://artists.proofprofile.net/proofs/artist/cf01f69d-c356-48ad-b642-e15998e8350d.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 0xa59576a806de69f8e32b6586aa63787a1b31d75f2d50e0c80708cf4ce63b3f7a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:47:09Z), 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/TCAID2480647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cb8722c9feeb184e484c67a408e12fc74d7d15a09a02d2e29c7e4ac4c48288. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAID2480624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fce32527ac50f6f0e54d04b4ae9e49b8e0f3cec9d366ac5f5dae254d351690. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:43Z), 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/TCAIW2421101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e7111116c71122fe4d6fa18ad090bdcde1891fe7dfb771ceafb49388ad4693. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:09Z), 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/TCAJB2404725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd87c41a24cf959ad2316a56469c125a8760412c5a2c5eb2525ad9ec9f7d18a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAJE2558672.