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 0x51b8b22f3bde556699fd9f6b9dd692b917803ccfe82b23d753b9b9a66c10bb62. 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/51b63f71-8751-46a6-9798-bd0290603f20.json and https://artists.proofprofile.net/proofs/artist/51b63f71-8751-46a6-9798-bd0290603f20.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 0x13d0d0c5b02057fe6c41604a4ecf8ab76605fb595b9d97cd2cfe5a3119610ff4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBMA21838912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4037cf674262e8171016df688c95d48627d5c696168ccfdb1f35333b2dcaaa87. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:41Z), 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/GBLFP1829941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348f992c8e6998b56e735f4121645d597abe76f2fe5dbe92d56b30cbc57c67f4. 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/GBLFP1834893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4397a13a70bf39198f48a9c2fd5e0ed77d07c094308f305b19cc3faf4f17a03. 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/GBLFP1939048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef26d7ea788bbac59ef3a39f7d4fe86a314d6804a37565c53274590e565e07e6. 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/UKXN21998538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb8217bafb7e737f93bfeb9d35c8a65c3f653acc8ab17bf9d9f7b2118549a33. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/GBLFP2022699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0194f97da3844935e94b4eb1628023a24d6b9e3ad6c2a67427a7dc1f0a5c25c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:48Z), 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/GBLFP2112128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f74700186f3c169a169c41c978a667f12716de6e54cb5784ffab4a2ec883d3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBLFP2120777.