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 0x438d51f0c55e9e098c6e52497fa67230b822136bceef8d35508081300f35b76d. 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/e70712d2-5d93-41de-b037-18a065fcae18.json and https://artists.proofprofile.net/proofs/artist/e70712d2-5d93-41de-b037-18a065fcae18.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 0xbc9f71a8c1ddc1bd3b0d02d0dbd22b0daf3f5f8a24d426a4783d12260b49b444. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:10:40Z), 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/QZNWZ2597670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37686ebf39e12577bf1a353256346af57824780d07c3891afa8319d7ad2dc8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPLS2540311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d63187834c588a5db3bf3d05b499744f4c52ee60aabd2c39fea9f0891c8835. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:11Z), 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/QZTB42543317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1fe64eb1685cba6cd73ca28124c47bb4c0468f48b8ee7dde884cf00702981b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:28Z), 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/QT3EZ2564163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d135387712e1f54aef8dd0054842dce24b0a7e95319de8e8edf3632ff4aba9. 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/QT3EZ2564165.