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 0xeea854472e9be30cd4f99597da512e0063442755f8f20ad957fedfe0dd048706. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef1db75a-ea72-4194-84a7-3733fdd9ab23.json and https://artists.proofprofile.net/proofs/artist/ef1db75a-ea72-4194-84a7-3733fdd9ab23.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 0x445ce913f0903b23df76a972815a593acd1bb44abd86f6b9e9a70da32dd17ea7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNJX2457422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36128c868b79a3e22b4b361f9177d96f4f1811653077d94295e9bfbc64f7946d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RUAGT2439135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ae98fb8b198efa8b7b4f9f2ee2295129af3e07de857506ad4cf6cd6099ac02. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/RUAH62407874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f5205614bbfa5718c7e9f713f65ff3a21a2eaf9eadd8f9db7b7789aefcc732. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:51:18Z), 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/RUA1D2546453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671c362c864aff9de99e5397e996f3899979e27aed1d341ea7279f524403f65d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:54Z), 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/RUA1D2546454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3d873e5709b9cd330e6b02789c514fc956fd14abf24b7d6f8fb8d77b546071. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/RUA1D2546455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a76b14e6027b207bec7d1e7bced90f3caa72070386fd63d4fa85bc8c946b70. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/RUA1D2546456.