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 0x1d4637947a359b96841c71f17ce26956939e9df90ecb66ea804de9b8d759ae8c. 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/35bb3a47-b61d-4574-9d13-bcbd5fa0f385.json and https://artists.proofprofile.net/proofs/artist/35bb3a47-b61d-4574-9d13-bcbd5fa0f385.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 0xdd5e287a96feb25cad79727307d28dfe99e8495a9602e918f6958929bfb55c5f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:22:03Z), 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/CHA831892701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998083f55875a9219951ce30348f57872ce935e89401c655ae3e1c5d72c05678. 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/CHA831892702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5e835e7d1479b3376052c3c049386e9523bd48c933b710a70f824f8eb94b4a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CHA831892704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb902b0cefe1d3c56cf300de4ebd78ba320291995d2084a9ba80ccd74e9c04a9. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/CHA831892707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad25b36befa453e81cbcb843c2fdec3394e4e9a8bede21622ac7a20833f1f542. 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/CHA832197302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3fd7f6028cf680c5fca0e3331e3d9e006ec3bd5ced3d28683163aea000759b. 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/CHA832197306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e8c16be42e8afba7b8bf2f901b24fbd6e071fbf1d307655ce2fe184c258a5c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CHA832197307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9516efb00ee8d36e906edc48b8ac497706758116f7630836032a86c0710a832. 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/CHA830000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50e487290a0ffcc5297041239d7647892fae345aa8b32c7c32508822d0cbfde. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CHA830000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6f5fd331009277a355eb7bf131709f9e8f821822fd7d27f52a4d3a976c4ab8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CHA830000505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e89d3983b86df95faf0eff5ebb553edeb9f57185c89a1558fda7dc43bdaf09. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CHA830000506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6b2ce37d9f74bbe6e48abe3e921842b29efdebb135719f19f4bf1dee36fa00. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:47Z), 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/CHA830000507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5414445b85e3eca449be6ffe315c371a81d2c56c57e914563fbf6a57b2e0b2b7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CHA830000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107739aacc9068de10e7736b65bb2dd92c9e8189e8547a798582b55af0f222f8. 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/CHA830000509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b79ac7a4fbe9fbd82e3c113b1b62c201779569a3ea14785c8711d11467b9a58. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CHA830000511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc1681e478963ae0054c5990daa4ea6f957c9257139d5857353898aec8c66e0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CHA832373601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5232d448398fc2a0a0e1f1264fa08705ab7dd1b214561126fee7aa50d22696. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CHA012200103.