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 0x39b14ce9f0d825ec2ffb6e86cf9a9bb559ff5cee18854d02dd3a9949994d0d3e. 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/851e3366-6c73-48ce-adab-3de72139f9ec.json and https://artists.proofprofile.net/proofs/artist/851e3366-6c73-48ce-adab-3de72139f9ec.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 0xb88a4e88f1fb76240055dd43dfb6ff57d665066e5a8436f442c8bc766ad80606. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:07:01Z), 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/ESA012437733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d52307d83e1ee893ccd2d583287a9e87879210639267d9c217289577bf20e6b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTVM2543257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdca23ebf02e912c4118d0b992bf4c93a00a124fda465ba9fa2fc23e0a2e6b2. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/US7VG2587552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac98ceead620da3013a966162d0da7505714eafb1aa951a764e0afecefafadd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMZ92500638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a629faf4432969449af7cc9e23edee0b45d4dfd6e451265dda7fc82464fd24. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZMZ92500639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac11055f14adc2146737e988632052756dd3d0894d9a417c627657b732eb8e3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNJY2517840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434618db6b8b188a6152397210edeb9e951207375ff2023ec0dd40acf202662c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMDA72510807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ad8cfec301ad5ca881b3e22fa08f1cb793ecd5f7a8f4b6cfae189dbefdd2aa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:57Z), 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/QMDA72510810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb309d13b444426eda9656e8647ac7e3f24f80e922e7ed40d70cb49d756a7367e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMDA72510816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fea7a78edd3a7382fc53a93908ecb8a0778c0b7a038fb26d968ad0341496697. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:26:59Z), 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/QMDA72510843.