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 0x4444ae66160dd4627c7f4f1ed30afcb0368264e97848eff46a9560feda55f42c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1e7dc1b-279e-45e7-bed0-a495bf5d7034.json and https://artists.proofprofile.net/proofs/artist/c1e7dc1b-279e-45e7-bed0-a495bf5d7034.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 0x9171066131ae43b61a565a2417ee82842213dafb67dfc09946bff5b85df3d46a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:54:01Z), 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/JPZ922014519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9899c1efae6412dbe7099be6c654181cf89eb5259d6f574043c07b90d59eb154. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPB2435801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9899c1efae6412dbe7099be6c654181cf89eb5259d6f574043c07b90d59eb154. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCJPB2435801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fb7e912109fcfb1b6e530e3a8d530707ce0f0aa24e69cde2cde8352bc22255. 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/TCJPB2492842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2371dc8247edb56e993067ce4687bcc194ec316313b898cb9db13f5a98e20612. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCJPD2538992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48aac716b41e843ecd90a136d2601badb5934ac4562e78ebf9e788afb07b68f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPG2506539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a1c1e6daa867011a846febb86ac7361f2c6da49d04bba30db5235cc4101b21. 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/JPZ922301314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e27643477630bd3f1e46fccde9564ad448d4f7f6537765aaba1b247880decd. 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/FRX202513898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe280ba37cbc66c9c8e7565223b35f0eec2ad607f59db5298b7e8ba510402f17b. 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/JPZ922301313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e27643477630bd3f1e46fccde9564ad448d4f7f6537765aaba1b247880decd. 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/FRX202513898.