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 0xf1f55ff4b807276d684a890408bfcdd786717a863bcf8eb85704205e19822add. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd326844-6c28-45dc-91cc-09c117fa8db4.json and https://artists.proofprofile.net/proofs/artist/fd326844-6c28-45dc-91cc-09c117fa8db4.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 0x21f8fe4469443e8fc33dceb3d7fe616e202c42fc5d7d69c2eb08c98819f313b1. 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/DEN960031001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f96072afa3db7442327b32d4911ca9935628fa148da6d782f0c126445dcae55. 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/DEN960031002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8054bfac17aa6e6aee8393fbeea395c74fdfddedec6f5c4b4b1c5810105dd4. 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/DEN960031003.
Don't Talk (Put Your Head On My Shoulder)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792e395c15968b15320007c387bb13e5917a57819fa17bada28b7f1d04b90c6c. 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/DEN960031005.
Broken Bicycles (Waits) . Junk (McCartney)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bd06c7bc6fb96572cd454e296cfc4212fb4f5cd86a2776d948d79b3d12b2ee. 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/DEN960031006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc660cbb7f49c594945b60a7b438f3369a7e1af860eb4ba1c9913438c86187921. 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/DEN960031007.
Green Song Based On A Solo Cello Piece By The CPS.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122e3152f3a5abe0e9424591bffeeda3abdd3081e9a1db1e717787c1319dfe4a. 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/DEN960031009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf367715dcf15fff6f63f5d3f6e48a87fa1edb176b03ab6cc1b13a46cc373b5d1. 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/DEN960031010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3989bac44a9a517a5d101902747cb0154a7b64b8095d7a00f88be54c8f7015cf. 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/DEN960031011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77e0917d3946a797ca5e466259f574a1962fd02f05a27fdbad33aab78fb72c2. 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/DEN960031012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d50b1b6dfaa993c9749e13d9c847525391d0e0c62ba99c9ad0aada185989673. 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/DEN960031014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa020b639dced48d898d67d0a8cc6cfe74694ae58a95da9c8f957825a77b322. 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/DEN960031016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b8739535dad473bfb841687e94092201e2a67c6ee80cc2c2c74bcdef7d790e. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:53:50Z), 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/DEN960031017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432124ea7b1336c86c16dc22edc419f49428b874ecf88ea9464afab751c5291e. 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/DEN960031018.