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 0xb5414b3e2378f3c310d55247a86b17d642039e94e958bc0bbf5913c895c1f99f. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c0e219f-7444-440a-8d58-9473900f1370.json and https://artists.proofprofile.net/proofs/artist/5c0e219f-7444-440a-8d58-9473900f1370.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 0x0ca63930401b1adb497dcfa34df8aafedeebee9088695124fceffbfbe8a87634. 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/IDA832006494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109869946fd93671bfc5bf90e66cf8c6cc0141b7ea21f62f5eb255cd99fbc166. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2X42372441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c89d83568ffba6c5fd39f10586a1eb241f659abe7c98dca402424d5b96208df. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:05:34Z), 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/FR59R2349409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8505382078cd1bea94d816bc19eb522299d684d53492f5caf210d8beedb70c74. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IDA832117353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56337edfdf495bfe4ccfad6b6743afd5df83cdbb1186f733b2480f674daed95c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IDA832203791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34bd0bbcc96fc369b9cfadc8a99820941a68bfbb8e47f24eb09334dabf2eb52. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IDA832203800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e8fca5262357af34d44249f050ae8062ee150c9c1e1c4c5eeae256287490a4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IDA832203834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc231df9b7ce107e27fe13b13bb28892a7a94b1217e731b9d29abe43dc57371. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IDA832203907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821fb689ff768b98380ed5f5b0365f9ada695ce430c6544ab5ad158773a6ddd5. 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/IDA832203937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055b5d551671f0a264d41ed5fb01cac6dd2883dfc35db5245e0994772e4216f0. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZYFZ2364405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58540b536b73a12f0e772cb5145ff3afb9e6a4ecee38a24a3191f7452d6d92d6. 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/DGA052561183.