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 0xff7ba41d66ff2cda38de142ad8f01b195ab49668c3ff289308abd09922cc9a5a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40b479d3-4e40-4af4-9c41-3b8b93ffc689.json and https://artists.proofprofile.net/proofs/artist/40b479d3-4e40-4af4-9c41-3b8b93ffc689.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 0x60dc27fc51fa99353b3278d08dfee53af620ef4814b167bf090747c95aab9fdd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:49Z), 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/QZES82340584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf8a6b3d847f1385a375dae556a36f60c91e8d8d3cb6bf2eb71dae928c971d7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:05:54Z), 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/QZHN82486325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dc27fc51fa99353b3278d08dfee53af620ef4814b167bf090747c95aab9fdd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES82340584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf8a6b3d847f1385a375dae556a36f60c91e8d8d3cb6bf2eb71dae928c971d7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:10:20Z), 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/QZHN82486325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf26f182ec4bc70bc758902cfd66b7a86f5754d79334e8c6a4d3d1be9ca0c9f3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFP2446723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739e14b65ceefb26a7470ce8c172db79a4ea035129f57d52c29f8199064e0078. 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/QZNWS2441438.