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 0xc045eae161a47e09b7478b4746261f4fcd02b8f6d83c609b3de3ea36e87075f3. 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/d8649fb8-ac6d-4fd6-ac6d-3396537619ce.json and https://artists.proofprofile.net/proofs/artist/d8649fb8-ac6d-4fd6-ac6d-3396537619ce.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 0x06d0541d26e43fa9eb935995ca084d6f5a5c0951cd1ec051342f0c2d41044497. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/COUM71400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eda53854ae6b270c82c4c907838636001e2a87ce7a1610868f2b73b34674c5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/COUM71500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8be40370612cddfe91b58f58891a82e0706545709507a215a5e94045f4e6bd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COUM71600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4baa01a71f6fc414a3657b5b6796199c8ca9eb922ff3cee8e0993d9a9e6c19c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COUM71800124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b0cb0ce1904e7ab7e7c7187199ad3dd9085f2ad5be7006d698a360bb7bef4e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/COUM71700161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc984fb7bfe47dcea0d7caa92bce02491caf267287c7f2a42c858c0434871d683. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:45:27Z), 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/COUM71700163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0a53fe582551b10495363cbbb231d8680b1d3dea1ea36f463c6f62816302e1. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZGLS2096508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04867f0f40d52ce708c9833a6b84458ac4d8693190b5a1348e15ad58898d5d2b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USX9P2431623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc815bf756e968bf4dee07dd76a15c4131ae16f567e4eb3f9f440a221466654. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN42556002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7801b4b7194bdf61c138e7f61edcb6df9ae026ddd308101541d9f115a1957308. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USL4R2510259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21d4f4f3f2004974748a9b18154b1c66094ab8258e13e0cf2c6f311fddcfdd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/COUM71700159.