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 0x8a613898d7438cb6980ba813473c4857785762924c442fe77776a5bb9f6b5020. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84bcc6c9-4028-4eb8-ad25-3ddb93c2b0cc.json and https://artists.proofprofile.net/proofs/artist/84bcc6c9-4028-4eb8-ad25-3ddb93c2b0cc.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 0x30c307da7f60fbf1669f3d24a18f8b84fc6ce4aa454b1a993b89d4864e978084. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:27Z), 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/QZNMX2493183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a231a14763aea3a7928ededa7f6e46ce98bbacfa53c1abb91cd52837820326. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:19:46Z), 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/QZNMY2487024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf359d05ed510de64d601205e6584d3481f47af4287596035419722533356db24. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:03:41Z), 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/QZNMY2487025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10ca576948a3e7eab39af897338a56b08aa1d43b02e7c1c71e6aafacf2d48fc. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZNMY2487026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1df52e40c7316f1dc9b782c4ef82c1bff9a9359c9de2cc359faf4b014db94e. 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/QZL382552452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7172daae6e3c1cf3823d4be9d732ebbe49eec9ffb3bc747132bbfb122a3da2da. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:09Z), 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/QZL382561986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3846861578d761873d1c2d6f856b801f596cf71f769eeafdd2f443bb1457b696. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZL382570597.