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 0xd6a5f9c772846239d64f3157173666145409057f5a4fb8a54d159d3994e63949. 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/34064699-beaa-49d7-9fc0-5c109eb89490.json and https://artists.proofprofile.net/proofs/artist/34064699-beaa-49d7-9fc0-5c109eb89490.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 0x4f21f29c27cb4f0c7f7b69f9dfcb762c3137999e90e84fa80ce95ef9f9ac8723. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/TCAEZ2033870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeadcbd8b4cec9b8574af414cf651389a563e8101869b3b1d953d1fc8f404d9. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:03:59Z), 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/TCAFD2046534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b7006447a495d7e97fa39ad327588dc2d0fdf39c32c169c4973ba2267f16e4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAFW2174388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fa553587dbc7d83b888954925c213084acdb2ef2e4702d91f64db7de2202bc. 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/TCAFW2174393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127aec419944e3ec9289132424f9be627265a2d231bda7cb8a959d3358859430. 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/TCAGT2334631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b81f3f72f42747d7161a716648bf3aa52215666b3d7fd2cf68bad85c860fdcd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAHJ2331040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780032bdde84b9bda8447b0adbb35ff2580ac7cc4a6786f8775eb36b2a17f8a7. 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/QZTB72486610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3dd52b88c93ef23794ea5eb7d1a137d04383fad47cff54f5172c98e8e17b7d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:26Z), 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/QZTB72419135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7656c8a6d0862bfc0fb111e0c74a322b11d4cf795c132d56ef84861341f1ae39. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA42560926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9cec02e81d58bbde3abd92c104fe0f8f4d95cb81bab4e96e11d2363f98d9b9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTB62522961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38cded8a376b269b48404ddbb5b1b9929ac7e2e7cbfe249426557bd4e45c58c. 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/QZZ7L2531240.