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 0x14e506ba8c6e966056a17ce5acd4d4d6ab9ce130339a08c0a3be92f244f18178. 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/5ba822be-901b-4d94-ba6f-3c27077205ef.json and https://artists.proofprofile.net/proofs/artist/5ba822be-901b-4d94-ba6f-3c27077205ef.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 0xc778ae8372937e33c6c7ad1d97825da45bd61a54fb0c1ce1ca87dbd85b6790a6. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/NLCQ60900226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3c70df7f47c8b295c86810537a4b802141e12626b3f331c1061373fdbfa534. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:04Z), 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/NLCQ60900228.
10. I Don’t Know How to Love Him a.L. Webber
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bb96af08fffadc649d0d9cb3e2f9db192aa03eb9d775f87609cd673d5a0232. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/NLCQ60900229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7139f0752e95544550b3dcd00ad3a7206c9535d55404a4faedc049373d94050. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NLCQ60900234.
16. Once Upon a Time in the West E. Morricone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca9baf9611542d6cc5e1209e1f88d0cf99a83180e5146590825a71c15a19301. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NLCQ60900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0460fd42d89174e0f6ab329900019a6b14ac343e9e2feb28ddb05a4d2b4f25. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:26Z), 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/NLCQ60900236.