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 0x45b31ab0ae52f8f98bec1e316d2090b73a2c93a9ed5dcb294bac906dfd71ebc2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38fe920d-22eb-4d1c-bc19-335a97ab507b.json and https://artists.proofprofile.net/proofs/artist/38fe920d-22eb-4d1c-bc19-335a97ab507b.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 0xa0996415841767c52ea5614f07e51f21de31d6fbdd6fa1e008c357c54132a559. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA62166010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20048bea4ce37945d25725430a163c8d97ced449b8da1b6bf79abf2e6d71862. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QMDA62166012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76b442a5051d42c539a57e82fb57e9fa3e1c0a6f377c015a927004172b1a74d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:23:32Z), 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/QMDA62166013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c24d17357f0692c89d36ed7be9dfde3f8c95fc2cf07f558c7f192dd04d98d7. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:56:34Z), 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/QMDA62166023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93b42ae9be742afeb1206d625f52557cb38c744e7bb13ff44d837a25026c9f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA62166033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51d2a6a53d5e5f5165591b508e45aad06a1209f0f2422a45ec654e88e0a1948. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMBZ92288493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b04020f097c9452e8be034dd131f543904b6bc1a8e73467417a2e3d7bf7a338. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:59:50Z), 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/QMFMF2321496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfd5a82bdb5c41ef70605efe6db38fa23eff0352cb48cf39c38306e95276725. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA0P2320157.