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 0x5c629cf137bef277736ead59e2684d0b335589f7af63e55c558b5e9c66914935. 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/3381f618-0414-4002-9b51-4d86f96aa17b.json and https://artists.proofprofile.net/proofs/artist/3381f618-0414-4002-9b51-4d86f96aa17b.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 0xfc75b1efc148b8599a2a7b98e59a67dcb41e4753f81fd7695af1fd2149199b12. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBLFP2126669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96abfd3b5f76622cd970e920e92e6cea1c6c214a5184d22b14eecc569f2cd97. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBLLT2328098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973a581990627729ad143c3764bbfdfe506dcb24bf6fd2b07455f29ce4d02bdd. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZNWT2314383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc3e6749b90ae0bd62b28b8a3fade40d0c24a81df1eec468b048d0a0e6d159. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZRP42388655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296bd9e613758df68730855f64562cd23ae02809273fb34bc15325ba876fe72f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAU2313533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bc119c908964eadd17f3a07fbda9b8d6042d9f0ba7ba9146d84b1d5f019c27. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLLT2349856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18df2c79b3503dad3c3f79535298e612ac3db3c1dee2aad5cb0f3387a4e1f362. 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/GBMA22347217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4d6315f1e858944e76095799a13f236d95fb065fa37c3bcf6ebe3468c50056. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX3Q92442656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9db31f47c14f903f0e9e93d697304174c76eb3610f753f2b0038300cce6ffe. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:12Z), 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/QZNMX2423578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c36b20b838a0b62cde0f0b1885ebee5d59fd217b7218f05ea57ab2cf18315f. 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/QZNMY2466506.