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 0xbf9251a083d9eca73436e5d472e89428e6617c999353140aab715ed683eed6b2. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c56d7db-4f71-40d4-bf74-b8add97899f5.json and https://artists.proofprofile.net/proofs/artist/3c56d7db-4f71-40d4-bf74-b8add97899f5.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 0x3b0d693b8ffb037fbd4a1e87b12895cf804b4914a5ef2808283464a423778642. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:14Z), 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/FR9W12005633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70449fd7280f4cc8725926bc89b4d0e106e961ff2518853a7910d6612d43efe. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FR9W12010998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2906c5ddd640cf21b5fc7cd0b768a07612304b770dddc146a05fe7b5a1aa4491. 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/FR9W12011000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e89658d0e701a4e2816fec949911ced5cd7ad49e3649e6d08e5c88b4ab1483. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:06Z), 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/FR9W12017688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb2c862c12251f900badc6cdb4543be257ce5bd722b2f29c659e5d872907403. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:52Z), 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/FR9W12017687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d2b84f3a1460bd3c7dfbb8c4300d31500e6db45b2cd80d94a2ac187252c2fc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR9W12017689.