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 0xe4f57cd572ffdbfd078c0316d9013192f1bbc85b1db438bba5ff4a30d5fb95c3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a84f5929-5197-45e3-8714-9e58c57c97b9.json and https://artists.proofprofile.net/proofs/artist/a84f5929-5197-45e3-8714-9e58c57c97b9.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 0xd14249cdb4ae13d19a8362648d1e39c5ca5425fc38a00a86e9fec3b4bef5aec9. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/US7EF1100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97779d08f8a2f5db0c5dea9c46c5be55b0ffade578e2f9aad74a7a29adfa34e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM80723395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc972036445c480cd0404e53fc57e67f606abec1b4de536c0777c7231b8b8d6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM80723397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6464517091cc4166deda33bbd60f892ed4da774ab966497debe4582e8d32ecfb. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USHM80723398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3f897c0379b80cccc6bb9676aa2cb0d373abd2b54b6d27d94d0be596779c30. 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/USHM80723401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f907ce9e715578a650b97a59e61e26c25f1cf6ddb29211132b054661392265. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USHM80723405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f6e106888695894849a8211659e1b97a778f0a8c1c9ec49340f8a078cf56f0. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:41:29Z), 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/USHM80723409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3a301e183a7940b6b9a09edbdb3535036a4d7d855d7768b04258e44adf6646. 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/USX9P0689239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d824ac4987c7c50482d0c1856f06144c5173a13ff155dbb0c5cbddb9289451. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USX9P0689256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed8761a683e275148ad475cb7e795342848944ac0cb49325d5942640549401a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USX9P0689258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5c86c5af0f72bfd1983b5e54954901b92aaca7a8f460e2f03880fbac9cc964. 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/USX9P0689259.