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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81077e6f85998c4a453a4e47ec1cb5917326cc2ccf4221a1ab7772627a245146. 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/f7dfa10a-472b-451a-b0ab-0d6c6c7c839f.json and https://artists.proofprofile.net/proofs/artist/f7dfa10a-472b-451a-b0ab-0d6c6c7c839f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5708baaa8ff51e7719a1d1e124abe243ace436ca5fb26da8203c60bd8229f9db. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX32F2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766dc98bf8b394e9d289c383c3e6cc422a48443012c70e557a982a2be3c1a129. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX32F2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2a9a6794507bc2f7d63962a713f47e509692a9d95848f1ada09bb1575dcbe6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX32F2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1c7f5d70d2d14361fd123f5ee45fcc11e0428fa35a8fbdf21cf9328ec79f0c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX32F2100015.
HB20 2 (LQ) - Bonus Track (feat. Flacko & C'97)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28861ae1cf78ff3f6fef4c4f373ff77a590bb88ecf5e51d29399f675e4959e1c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX32F2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d5794c85b6f3a093f58fd322eb9c52587d1a81973ee60d59b9e7f763e12ba7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZGLS2104134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd7bd486103b5173da06ad0c6fa23c19f83486abf07f4e7e60af66144996732. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:00:50Z), 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/QZGLS2104133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7edf578a7d2e5da4402fc9117d315c44ed20d0a0ab5bc1514377bce4076e14. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:01Z), 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/BCSBS2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffe6fe8a49fff1be90f3a1701bad9160a0ffd03bd21dc06e3797510f21e86ef. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCSBS2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5842cf82b583141ea16cf03cee2e37aa8d4acfd0dcc4c822e1ed2b68fd77c7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCSBS2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa723c8ce081a46904ea6689852e692ffc36c1a942f3b8eeb1acd0d4def383ffe. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:34:47Z), 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/BCSBS2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0461903363295801d780836b5a41bef1ff315567f32c47e6576d1c06904587db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCBBK2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e1e13e8216eaa749f23c43642de88a0e9e48e2b3a992d9f8cfa24d201cc1b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9L2464692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bec373a8c5ef97a465cd3134151356dcab420fa23c4109d2c848696538ada5e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZ62272099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d60e61f293c250be64baef2c8ceac6558129e9118ee28b5549445ec8838f121. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCBBK2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed4ca79a0900ffd4c9da82b6f917f38665522f0252c58b95ea7d0f4807703bc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4SF2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc331b9710ee811bb4cdff21e87bb908e758c33f45a46870387d4d25373c119c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4SF2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc09a95bbc07d4ceff8dd4cd3f40c93cb4a6bc66e620de0aafcceccbe09d1ba9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4SF2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48ad3764a6ab35ff9a084e840362e3f00e89e37d13118a9cae22cc024891283. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK4SF2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa307bc625784a97170405a579e3bd345fe462aad4a618e8a8462f1841caae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BK4SF2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3563c7f9f3518dca46adc528df1950d7f2fc95bbb3ea5608036a7f5e1d9614. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK4SF2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98f9191c8f44acdb1387ee066949513e7d5c3e5352f91bdd62e11934d385d0c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXXHJ2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73b92c7aa38cc7fa4316ab0704f22fb979f94b460f9b8a9cc8f7f789ff05253. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BCJTB2300001.