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 0x6911aac6c48a0e55c3c757e64dc056905ed2f7d84889f2ecb82a4a16b2e211a2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dbfc43e-a5af-4460-baba-37d1554ce12e.json and https://artists.proofprofile.net/proofs/artist/3dbfc43e-a5af-4460-baba-37d1554ce12e.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 0x6dc3f0437886b6588409cc304e08de07466810e5c171b2ed8a397d47a3b7a33e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:18Z), 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/ESA092509090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b4bd103f4acd1bd7d112e18ff143e8605c8b79fba02fc5d49b2b895b1a6046. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:46:27Z), 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/ESA092509091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365cfc21ce89bda5453ce4b086a0f400b5c293a4a848f5a9828d0b2d0ed6c3b8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:55Z), 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/ESA092509092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43449471f6bff93ec8fb1a1c739c495925760f592ee6986481ee9d5f2ac87f6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA092509094.