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 0xbbe27896794ccabc64b9fa05e4e25722e26522dbc8261a62a2349d0ee7004d57. 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/f3835bb0-d466-4a72-ba54-537b71d3b914.json and https://artists.proofprofile.net/proofs/artist/f3835bb0-d466-4a72-ba54-537b71d3b914.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 0x9f2b45bb0abaa37f312306981dc5d94a9d07c666e0a5ee4d1f2b64db72d79027. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMFMF1594717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a0798ae5a12dda43cc4838ab4e190d24e3c0154ae30ca9ecf991294cdf09a2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:38:07Z), 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/QMFMF1594720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a07deb76cc5a8640846502c6dee44516b8bc372e510e51d4a31ec4cca54372. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/AEA149600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6224b8b3cb69d379726afe29476f701e9aafe6a8ed96cfce24b8f17c1fb82b6c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/LBA081120324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ece514a8967bbf025405fcbafe375289761d84b1805e7fbe15a714d5848587. 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/LBA081101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa263cd5902ac35c63bf3ee5d6606c63bc92440ce5f098e33036dd260fb932f3e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:25:18Z), 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/LBA081102585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c017c8a75b57a4f8c06fd312f8ced46d3b6987109a621b51849524ec1572caa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/LBA081103785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c017c8a75b57a4f8c06fd312f8ced46d3b6987109a621b51849524ec1572caa. 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/LBA081103785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026c76134f6bd435ec8cc796f39872cfa1657e9b6ef71997c979174c61c72e17. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:54:33Z), 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/LBA081103428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cd2f881dd4c3e8d65845a8b65e4b4acf66518b1b2edf5095244dd9d7be8abb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/LBA081104134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b68746f9a8205f0d48da34c883f2386009b8c80a5601e7c7c37fd15dd22d102. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:34Z), 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/LBA081106831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c26098fc7f744bbd975d66fb005728e50f8324e29d9bee7c5a96a1af50b5574. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/LBA081106839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140e5cc173feecd856e807fe618d46f599d4518e1c518838c1eeea6e29a830a9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:30:14Z), 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/LBA081106832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ef807e1c85f2d4f9b341fee6002dd7d3db48a1be7dd1e74fa81d167d6f66e5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AEA142004570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756625eca0d56292b2623f176284349c8914dcc70a049247e13f08e26c8f1a7d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/LBA082400995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa67d05946f4a76f6310c0eb935669081e0b13f798d5e5df883e587dabb2dcc5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/LBA082400996.