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 0xc791a79765ec6cbc14e5e222d179f595c59e8888e4e2c0c7120e0261d422fe05. 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/9f4c9f54-5422-4b3b-b3db-910dd7faaf7f.json and https://artists.proofprofile.net/proofs/artist/9f4c9f54-5422-4b3b-b3db-910dd7faaf7f.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 0x6e4b4421a1ac7df953be27868e84b7ceff32ca267f5264df9575b53c94e49b5f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTAW2210768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4fa5bff775804592b29069543fa11b49c3d961d686d505b758f8d994c80112. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZTAW2210769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2913890f0561a7c452417c46067dcc28e312818cadbdac1c195f434086140de. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:32:14Z), 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/QZNWZ2254219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa585fe291d556b0781e4c0539cbb12ce466d58ac475088c50666f0dba75c8230. 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/QZTAW2210772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038bed7de0056b6a71b0913f234f62bb405c1d2d28a7029d13d83e6401956274. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:13Z), 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/QZWFK2411685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8645dc63defc363ebe66923f35753e2ade35c69da00bcd0688b563c14c1458e. 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/QZWFK2411687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113627bb1ad44c9cc2357672ca3b255c2e0fa9311be99d66603dec2d49cd0206. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:24:07Z), 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/QZWFK2411688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10987f77551187ca35644dc0ccbaa590091df2b960642bebe64aa1b4c0b85651. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFK2411690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bad130c47d03dc5ceccd377e6985b4f40836f8d1d66d562627f7be2b7714c79. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFK2411691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a10ea2c40acd37fef99fd710330c5d419457aa62560e3f6604d95ff82ea31e4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:09Z), 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/QT3F22465359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9d76364fe2f097a9b85f3f6a0bbe6f05f9941df3ccbb7a6283b5ffe189bb76. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7M2501283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04331e86a3be10d7df4146da17cc46c5551b8a47b2f434798998c422570c738e. 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/QZZ7N2516251.