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 0xbc3a93c9f5404db678b1951e3d0df746f9d3aec51953e34298b75d84a7aee1fa. 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/0d5baf98-5ec1-4cf3-a399-049ec578b511.json and https://artists.proofprofile.net/proofs/artist/0d5baf98-5ec1-4cf3-a399-049ec578b511.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 0xd687ce8a9a34e82fcf40048c01dff5839e573196d696c81c98593892787bbb72. 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/FR4EO1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8235069c4ba8882cf8ce37e80a3957698970562d497b853f3fe8ce4d8a41a8e8. 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/FR4EO1400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6258a1b8d5f823d883ef436b34133ff49f9b4d0f867edbea11b219adaaf1c20. 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/FR4EO1400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd39a20400fb8d3794aa8e49714aa9c82bb7e8e33326867f7f68beff8ec2a6b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR4EO1400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93165ec3fb02b21806942e8c3358804d2c396db256ebb94cc0c0b4fe6360d6. 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/QZNWU2241066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edd579eaae1b13fddac5365bfd98f8cd38432ca57d9cfe920d3b2ec3740a1c3. 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/QZNWU2241069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8e77c5fb46a88ef7c8d9fe98e2fc593d7472ad306ce3504c505fed21ef9e9. 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/QZNWU2241073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7f6092415923ab20e336882bcd59fa27f42453f527e05a4fb62224dd3e8cf0. 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/QZHN51962411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b8d624c8ce4fc409dde0a4e0b33aad1670de4eb39ba6d84f2485b504bc1e93. 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/TCADC1767310.
Comfort (feat. Chuck Inglish & Jez Dior)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e847acd3a0177c3fd830ceffa93d8e19d6d032631cb6d519c3bf393fc2ac1b. 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/TCADC1767321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60bfd08ae59d35c3e5c16b5523bfccf2765d57ac680903d292352b047e10ed7. 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/TCADC1767425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3bf9a9bb287fa9f3376ac52545ff50d8d49d65ba4cefc8a71d3ff4083f8885. 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/TCADC1767437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2f66439e7bb41ffec8ccab7d266a8337f6746f524515f520d4039a78bbebec. 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/QZES92024018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7ab84b1cce2677a128c45bf50ddcb422c2e512d90fd4fe18e074af0390af99. 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/QZES52081618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd52b95f3b5968deb67ff186296b13ad1d5d24d29fe8f4e714450ae3d0889d7. 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/CA5KR1831074.
Crazy (feat. Rome Castille & Michael Christmas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefef7409ed1b3914b6ccb9689690fbdd2e0fcd72bfdcf1b54f670b6f4fabcde8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USLD91600297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa315d2ad552b80cdadce8022f6696f3fdb0660d37cedf27a1cdfdeb2b91fabb7. 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/USLD91600298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c30f5a8de39ddcf03fa85d6d15b6f8ef81b702676ef13c66b5c1be5c27d9db. 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/USQY51616829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2883edfbdf3cb8ebfca9b3086bbd329eb9856ecc04480b20511f6944049dea8a. 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/TCACM1653881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910a8b0c95360c67fa2c465ae4ff9371d29e005c2d9958822330c4535951c90d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:08Z), 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/TCACM1632754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720398b8f2faa89f5a35a0c3acbfd87a51ed7895b2e1355186771834c7a0caba. 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/TCACM1632758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4237ee5bd71e831eab7199cb3af46eeef0360c20163fbcbd1ded8b6a0ac7f2f7. 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/TCACM1632760.
For The Love (ft. Ice Cube & Lorine Chia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0da38a52c9f0456d7c96ab902c541d5daa176ea10a9c8a7b8a8d46708eb45b. 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/TCAJK2520954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd687ce8a9a34e82fcf40048c01dff5839e573196d696c81c98593892787bbb72. 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/FR4EO1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd39a20400fb8d3794aa8e49714aa9c82bb7e8e33326867f7f68beff8ec2a6b. 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/FR4EO1400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd785db42f9c179e083d805781fe1b0f46cb055e70d65a5884072248d7aab5514. 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/US38Y1731204.