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 0xfb8d75292eabec8af1f191c101495f02c141dbf34538557c9deea0f5d1c589c6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15937f67-d147-4d93-9c9e-b98de5be7c42.json and https://artists.proofprofile.net/proofs/artist/15937f67-d147-4d93-9c9e-b98de5be7c42.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 0xac3aab65781b8ed272c0702d022da11ccf3d1ad648c293a405e1ca0a158ddcb9. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:35Z), 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/BRGO32100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d415ce0c8eaf3c1709a4dd4b210a709854bb4e6480520a1f5748c8c94519579. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRGO30800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac91f58b2d4ec62e1ca1ac09f2fa146339dab332ef7768eeb28ff2bb1e4762d6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:40:18Z), 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/BRRPG0900368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a76f2b02bcad08b330d9af91993cc5bfd721839196a618d54869f4c45fbc0b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRRPG0900360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c750eb225679563b21f611b886de1daa891623c5fe125bf3c436a3525673a79. 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/BRRPG0900361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f87140f3b2b2482290f776e9233dcad585f7632022ab986553ca144aaec754. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:36:53Z), 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/BRRPG0900362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4a20b8523e3f8c0e749d1f736cb14a1c3135024f2eeb4e2f6d58c14865434d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:54Z), 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/BCGI02200002.