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 0x3ea68eb10763277a74841b9f1c3d5b631f9790a1676c8f8d0433bc152e80a8e0. 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/a27b0060-02b1-42a8-a1b4-bf6dbd1be757.json and https://artists.proofprofile.net/proofs/artist/a27b0060-02b1-42a8-a1b4-bf6dbd1be757.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 0x3d8d9ce0562ff3f565fb6de9182fc39e2b89b92cbed20eed9895b7f4d2c81ce1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZRP52562646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8b92041d53ac0865e67b1f3c3cb21bae1492daa5809fa46b41a128d411ac36. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:25:11Z), 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/QZRP52562649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c4aab5550d57b494d23d0fff1470586f4a32f8e9f8961ea25c6800dda183d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:52Z), 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/QZRP52562650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad655b979b19bc87f6d3deafbccb26f9df7b73c2941c119dc0000240391e784. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP52562651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0d6f9df006dc217a6da52c221eb11a0f5da2b81b2a517631f6fd592bee2b8b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:38Z), 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/QZRP52562653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7458fe1e385b245006d131e23beae34e70418f68ee6b3777656f0d39067ebe27. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZRP52562654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7a4f1158c278ea6352ea2e757695ea595db92f767c97811c38075400a7008f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZRP52562655.