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 0x0e29f12954f8336fe313d30a1b0643ca2b91465e63539f13cad3dfa42598415d. 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/e4404778-bc88-4282-a0f4-a81b8be99c5b.json and https://artists.proofprofile.net/proofs/artist/e4404778-bc88-4282-a0f4-a81b8be99c5b.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 0x53e7f5af22baea83db24f41ed38b17a1a0e115583ba60bcf8c7dab05481eb4b5. 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/ITR0H2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd200e22e2b09bd1308405041589e1467ba31bb2dee184c7c9ec4ccfe7e92c557. 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/ITR0H2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee6de87264af074b7d28cf09cfea35a2248cb2dc4fec80790db822e62e39e9d. 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/ITR0H2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bd96c929e97efac27b3c3e542a67f2bd6f9fb976c59f8f767b2afd2ea3ccd5. 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/ITR0H2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc4a0c13f907b41089af7aba056e810ceff2e4b9a8bf1b5dffaec7e88cc376c. 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/ITR0H2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892755257a947172d278e12f5687d5aa4447e0f5d433b75ef0d1403823a639c2. 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/ITR0H2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bf229e6713634041302042e8584db099a3f7c0018a3681117701ec3e415907. 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/ITR0H2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e8ff28e7d958079aa8bb11f9e3a88f894553c9cc6eaca39a94e3b12e53c15. 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/ITR0H2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05624fdba5559f45f3c0fa4807efd46d264d9d0e21a88e2970afc6441e00d75e. 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/ITR0H2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2a0c31662057ed3c52c1455f2b0dd807953fc433b69d9fe4498bf145c1c589. 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/ITR0H2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72b2bb94b8a0a02c798ca86a39a66a086dc4cc51b291239a609cf8011678cd8. 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/ITR0H2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b453d6646cb8fe1e6c7b67ef5fc8bdd644e45497c447f89a6fb019b9c06ec73. 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/ITR0H2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c88657b5f957de1859b599987e879f1a17865df976fa94e48a3af1a09df8b4. 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/ITR0H2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca64f5a4292f5704b95512811307c6aaaa19bef664fa245fd1abc672dfa4f75. 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/ITR0H2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d49d201fa26fd49b2bf456b1c8bd518e3a7f2dd54dbbc39a51487b2c5ea86b. 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/ITR0H2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9a0b981c5500c4a9ed5c8b4aca36956d8798edae0e7703ac5a1f7137f54acd. 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/ITR0H2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e34237b0ab8ad58e5f19cb828b26394c89fd77b96278145ac81044af3eb3a3. 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/ITR0H2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0313f31a4322288152889cb8eccc246a2b3734eb1892faefbb97d321ba085476. 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/ITR0H2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3067271549c852632027dcafac56c4440e08c0b0d1c9e74d462187c9cc5b59. 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/ITR0H2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8562bdd30c2094570d5af563a19ba6d5bb98a515a4fad7457f95371cf636b82. 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/ITR0H2000017.