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 0xe25ec59faf22214cc88547cfced858a03673714dc3a1f0b9dbc4c5c0164b7564. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d70c822f-48d2-44e5-8b3f-cf9ae65bb3b9.json and https://artists.proofprofile.net/proofs/artist/d70c822f-48d2-44e5-8b3f-cf9ae65bb3b9.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 0x8f22011f0e92a5f0de4189ca891c587720abff84bd4a99de25bca84bbfeab6d1. 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/ITI022300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9da023aa6cdf9c1c24c1c413c2b8ce37551adaf6bda80524d045bb4e995d195. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:26:44Z), 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/ITI022300664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55adc8730702016ed06add0376f0b44d60cbe54da605ed9e08762ad30aa02e3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITI022400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f22011f0e92a5f0de4189ca891c587720abff84bd4a99de25bca84bbfeab6d1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITI022300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eec94c8a5d6d6683c9d7a97a14a8afda2fc71130fcbcebc0280250c642d7f2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITI022400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17730e09bba20df3824f26c18c54134378f7333b90ee4541166e5b4d2833194. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITI022400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd5b148bb6c0921bb82157f310fbf1cbda64c882afc0b5512b4bcab6f8a92d5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:56:35Z), 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/ITI022400051.