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 0xa573ede9ceae4cf9fae725a3ba264bc9d6755b0deb2fa27ea347f8a06e7d1eeb. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5abaab73-e488-4ba5-b1a3-004ddb7a34f8.json and https://artists.proofprofile.net/proofs/artist/5abaab73-e488-4ba5-b1a3-004ddb7a34f8.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 0x6b6a7a427cee067220d8f7371d0866082f724410f015c09b5f63cee6f5a20142. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:44:38Z), 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/TR0300601563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80c61ca489569053e116f8b8aef27414dffb0a1597802ce2bca950749e4398c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TR6120800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd43c9cfb10e0e847c4b94c4e09a0f69d0c74ca5570bb3c95fce29bf99d9c4a. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/TR0391800287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8580926a49d298d7c8b1a2273f9c5e8a1eb7f41467919de954cfb3169ff7cb6b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:05:01Z), 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/TR0012000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce773dee03bbce806c8a4dac64208c9c085700c651a84249d2b410336527beff. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TR0010500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bf246f08c317b09627e2cf7f179091d235361620a590da4239a27e8a0adf47. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR1290600720.