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 0xdd8dade2c0a370b8e78155330cc7f8a0743459d3bc43a408f963f7a4ea6f4ed7. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62d20dcc-df7c-470e-9311-6bbbd2d52ace.json and https://artists.proofprofile.net/proofs/artist/62d20dcc-df7c-470e-9311-6bbbd2d52ace.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 0xe27be21fac1034f13c77b229e062b566d5b96e2d979432176dabb0db74557339. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:06:55Z), 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/QMBZ92069766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6806b163d02da59591aa959002d663a4a35e40c68d6b380c084744b81d4d7e34. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SI0262500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681b8cd4157594a277064439fa14a8d2a5d913095a44351b5285fd6899f8cd16. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SI0262500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af027f9777bcbebb8980febf5a5b9a0525c64068d84a34f4099996c9ee7f902. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:55:27Z), 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/SI0262400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4607be79f53b17f45c9ff15c97fd4bd8f30a969e01c96e5c6c09fcf4d7bad6ab. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SI0262500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d95e70f22bfeb5895f096ae1f49371bac3b921e835dca864909702f7de9d5a. 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/SI0262500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b88b6cf2d75770b9014f958fba4e5fad3b8437bdc9fedf0e258e397fdfc6fe. 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/SI0262500007.