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 0xd47199cd60c69d771f3f1736f47bb7a6d4c5b922974e427bcf5fc8a24d8ab40a. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/280fe52d-1e8d-4c12-8420-f0e617b0aac6.json and https://artists.proofprofile.net/proofs/artist/280fe52d-1e8d-4c12-8420-f0e617b0aac6.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 0x7237a259b8e9bc815bc9714b25175b6ed1aaef44c23f259a35411fdfac37cd9a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:19:44Z), 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/QZNJW2167367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd89a848fe1f1b716d2bff08ef04bcd31af285c6b9130fbe768a45851f39478. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BR8K61600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba83e48849694780aeae50961a004157d4e64028803782c8ddfcadf4d9ce645d. 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/BR8K61600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68def669b55e9298f184b95b4b7ec19f6f3743369f0e535207799b4f06146b3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BR8K61600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ef2eafdf7f96867d6601f7ab8d0b6d0aaae76e5ed2585af26bbd484bb16512. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BR8K61600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc25b89fbe021a314201f5dd472687289e0551e6f90145d975cb2e0ef03b6734. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BR8K61600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c87a7cd96fa8f2e4bba5410ebbc82f9a3db1e1325e4b4662eae96fd1973ce02. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BR8K61600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5483e105d5f0e7ad100bdf8c8d0fe5ab47d1b0470573f00d0df0072a0bea8901. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BR8K61600010.