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 0xb72785145b704d4ea0d9f3c365a029236b940a6bbba1ca1ef9dc7562981a76a5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a996b082-cb57-43b7-a510-73f34b23d5dc.json and https://artists.proofprofile.net/proofs/artist/a996b082-cb57-43b7-a510-73f34b23d5dc.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 0xe96db63c34859ecb24b8d29eabed148df95a032c979e2bf47f99ffd3638e80d6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CAZ700101113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27e214190132aea9620de7508cf7c3b9ecc06c61386704856f65a078975f3d7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CAZ700101116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8430b9cc5a30e81f836dc70bcbb19e772ec762ff51ddbc52c99117d380c527c. 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/CAZ700101119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e38d030a0fb4091ebab4215589600701e118d619470a40254afa8ea602c003. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAZ700101122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6c8c385a8e0370e279ec652959c19ce0cece4ee71f26f0dba3d5841d8fd35d. 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/CAZ700101124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d92a4bb629f1edd2ef9e209496ebba4272e6d301c5f9a8d3fc4f8089380bb42. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:36:17Z), 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/CAZ700101128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd954003944b074c51559c44f797304a0e75e69ca436816c140d9f4c82ef8b365. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:36:23Z), 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/CAZ700101130.