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 0x9da9081a4e2994d745751a15c27516c3c7c528bbded71cbd4e2e2d4ebec80145. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cba27de-de01-418b-b432-c34e1ed653c7.json and https://artists.proofprofile.net/proofs/artist/5cba27de-de01-418b-b432-c34e1ed653c7.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 0x09ab3c04633eb6716bb803511dfd818ca22715e81a711f5d21817f47fd29859d. 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/ITB662500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e608e27a875501ce2423cd1ffde0b1c40f281282433c6dbf8a0c093a7eab246. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ITB662500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d8cf743a975e60ae036326ebca3e6cc6b25e691b8426c6583692d6fe5864c6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITB662500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48cb1320e05dedd1e620fe41d3fdc3f5f7f5136fe5cebd77e5ebbb1e27d12d4. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ITB662500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edbc7ae571773bfb07f91bf128afa2eb2df5fc44dec7173e4b5ef9f5cf37284. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITB662500137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e832cccde359b0861ad19c6e9b070870b3c58c2ea51d59119c9f229662d6ff4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:10:15Z), 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/ITB662500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab7f104d564b5f546d5c612c47b6601a52da93fb5c7a3852962d6f5720589bb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:07:13Z), 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/ITB662500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe37922496f0ae95542546674e558c9f4d05af87765803e59e5b9f72aa52eda7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ITB662500140.