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 0xfc690a4d5edb9e26ef0102258269211ee3eb4851451e84f6b0b8cfb1be5e2b6d. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d70d3f2e-4b30-4836-b0ce-be69e9102687.json and https://artists.proofprofile.net/proofs/artist/d70d3f2e-4b30-4836-b0ce-be69e9102687.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 0x91ce8eb00bf0e9ff4628d0a015fbce2fb99de1c3aa1be70036f6425ad8f48ff4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:02Z), 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/QM6MZ1973088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1540288a41e18c60bccfcc96164c908695d63a9c2821efdb11143013a92bd324. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:16:46Z), 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/QM7281913788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eb129518078ee96bd60bad8a8eef22871a649968013454e757422711537771. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM6MZ1586651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945061442094912d19b4d7b2947ee1ca041e253e5171f4f870a3e57684ad8854. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:33Z), 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/QMFMF2025663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707597db182965469529a8c00dba2325a5fc540d06158e96440ec134248afebc. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMFMF2025664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d0068ff9c42103443a0b7b830467c1454a632d46eb61f0a232a6d14f7e3b5f. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMDA62153690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50acf0b485d8d65b32c00623b363c20d3f0b3598ba11841cf33502160185bf2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFME2362338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50acf0b485d8d65b32c00623b363c20d3f0b3598ba11841cf33502160185bf2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMFME2362338.