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 0x0a7276a9400a2ca291db03cf8e38c0ba40135845a43bccb90e3fc1beae29ed16. 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/73b64b93-6f30-40de-8b14-a6e9fa64ad10.json and https://artists.proofprofile.net/proofs/artist/73b64b93-6f30-40de-8b14-a6e9fa64ad10.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 0xa0e6219f2b59d33428ab64dce57a79a572ccefe29bca5e267d1eaba327bf072f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:23:05Z), 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/QZES72349881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5e7393882f368c7129e570e038dd0e170104189c04c89a2338d76c4512575c. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USA2P2323546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6306bc744266a84a5ff09a93b1f8d9f2f4eafc81c98ecaa8e8b4fca0892397da. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:48Z), 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/QT3EX2461505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bce10db12ff4f3d565fa83c6be17cca447c86e617c3a68f3d43e81f8563a7c5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA62534352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6306bc744266a84a5ff09a93b1f8d9f2f4eafc81c98ecaa8e8b4fca0892397da. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3EX2461505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55deb1ee3037bef8e44b7f4f04d894146f32f9aa3bc3dd555690dee989a31610. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZHN62540505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeacbc0ac6374f8b76eee01813259146531f46db75b7e11bda1906236581372e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:53Z), 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/QZHN62540507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a67c041613df7635b5e1fdd4a835c6b8a80376ad57732342b90860060ca607. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN62540510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aafebf0c93ebe7f188c6ce4af9032103f7bebd46e531b625370e11a3b8af914. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN62540511.