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 0xe97c4186e8df961eba37e2c73d285d61d5c101ea09d3f5a6d65a2febe5f55547. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3643c25-7bd8-4d4c-9422-d6dd85e33f49.json and https://artists.proofprofile.net/proofs/artist/c3643c25-7bd8-4d4c-9422-d6dd85e33f49.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 0x8a2ed6824b9547e9773522a636f37aab61bcc0f1f1775591ae2e5c63c9958b9b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCABZ1494415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4bd3f0d479948503597528ac00e8f1d09c5f02945408f658adb5b9f1cbbed2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCABZ1494419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6ec2d0bb4f074dd3802df10e09440b0c463bc3d9657834098a16d0dab22ff1. 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/TCACL1500175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a610b6f37ec33f189285f2ab8fe7e6826ddcef9f05650376475488dca4df478. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:15Z), 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/TCACL1500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251f7d0b2f0f58bf090a985ec159da987fc158651daafaee0212332d876525e5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ42008636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063ee417d2cb2e3ecd8b6c33d84a4eff0118503c97278ea46e08b15c8502cac2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFW2414957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28987ac42cf3a1ceb8e3c74c58c110846846bfcc68751c6f0e7839c9087c557. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:00:27Z), 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/USLD91718304.