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 0x02295c308272f06e39f3061aa4adcb679d039ff50cd54f30a81ff13e65d5a75d. 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/e28b94c5-182e-42e9-bfed-3d8e320240f1.json and https://artists.proofprofile.net/proofs/artist/e28b94c5-182e-42e9-bfed-3d8e320240f1.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 0xbe94cc9d9630f5dc75811175b21c3a0ba9c6e3956e7ee8f9c338f75722d61bd5. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:27:40Z), 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/US7VG1720868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe3e770a63b8998a28022117f839d055c47b5d2a44879ff55a9c240e1ae2400. 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/US7VG1720869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224395be02266a89c30a8a64e36440ca90dc15f7870b574c06ad3c3440991533. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USCGH1523659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3e73a51e1ad741b9a807c44d4835c3ca4cdd7447dbe8bbd2b246db582f4ac4. 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/USCGH1523664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fdda366a3d63bdd199fd065da889d49ac2d9574230c3d3fed8b8ec1c7f06a3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USCGH1523665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e7e758087ef1ca88201637ffa75b980a9d4b5bf2b0f67131bcf50d20b28d18. 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/CAN111800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb64479a04d887e62a2d5b1f32525a36267fa570e207ff1fb8558bb069a7a9d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAN111900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1c397f8a585109b9f80f9b0ef0a0b0b4fc0fbb8f02166efaab3dc73439f62a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:29Z), 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/CAN111900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04032e82d071245b0c654aa1f33cfe073dfa22180cfaa419abdb8ac0a15cb1c7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CAN111900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a2cec4c197488f6476e970d669a58112ec041e911c3696fa5cc1cf46ce3b14. 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/CAN111900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a678d1a4f009e78d8b0b7fa460bb6efabe15d738f4146fe379c5fdba23e115. 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/CAN111900035.