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 0x3eb66e585647e661938f28a2c96ae84e2b7a4cf80a0379bbf8a9078e83d6875b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fa2d709-c140-440c-ba62-e1a549340cee.json and https://artists.proofprofile.net/proofs/artist/3fa2d709-c140-440c-ba62-e1a549340cee.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 0xa16b73d937e4528b9d6f1dbbefb36f65b3683d01b1051ce1f24563bdf6a40aaf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZXYG2306767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0058d70a8b357916850d4ac7c5568f32f773e7914a783bd47addd36ad9aa803c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:58:03Z), 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/QZXYG2306903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc2e90f9da9fdf03c0fa9a065486d9b02d506e64d10ba71e46b926e296ad827. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:32:51Z), 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/QZXYG2306953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3184483f8d0b35bc11bb6d48157d71d20a22317aab0ce6e85c80deb81b22f812. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZXYG2403112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe015363bdb2ca9e2cd9c411fd80a6d433663a63bb13e7e62292466a051bbfeba. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZXYG2503061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd396f1c69b57aef419e5473f1cf2bd2787bc9a8de7fa6334a0b430f8d1572e29. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZXYG2505212.