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 0xb8855bc28d7da98832a3a4f8aaba1196d5a399eae0cf1fb52195d1e372ecf569. 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/9499e1e5-ceb5-4973-a05a-f22342036ac6.json and https://artists.proofprofile.net/proofs/artist/9499e1e5-ceb5-4973-a05a-f22342036ac6.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 0x79541a9fefdf0dd7c247be312bccb7596c80914c2c25f995d45d8ee2b413e464. 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/CH7812355039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d47979da1292da8d7368b305fa98b0c8ed4d607a6ae399a499ddb26af2d6a6. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEZC62417426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d47979da1292da8d7368b305fa98b0c8ed4d607a6ae399a499ddb26af2d6a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62417426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e463a108223885c5f5cd1bd5090bff3b80451678986f09288bd9aa834de32a2. 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/DEA622400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e463a108223885c5f5cd1bd5090bff3b80451678986f09288bd9aa834de32a2. 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/DEA622400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dd20948936c5ff9ffdf3eb5108a015b0c72363fc5db2dd2fec885c7c520a4c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX201824105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bca6cae48e12a098df82a92e2babbb05fff09607e58aecffc54f906731b976. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62292423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4d16ad2ba75c2d4ef0201fc2f474b170d1648379d3630894cccbca9b6dfcfb. 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/DEZC62327298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c247d99416abd322750620683246aaa04eeeccb809207e4544cf6e73aa319. 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/DEZC62285942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2e3dbe613b4a83d0c48841967c3f763d057cd923e3f11300e29cf4a0133d23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62338546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fdaf1ceaae5bae7dab58b4c92f4c8b3e584a2fcf02a4a7768ae8196ab690b0. 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/DEZC62204049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4d16ad2ba75c2d4ef0201fc2f474b170d1648379d3630894cccbca9b6dfcfb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62327298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0df3d8669b56af37506633a6e43ed3f9c76843503c1404431c77283f7039af. 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/DEZC62298663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bca6cae48e12a098df82a92e2babbb05fff09607e58aecffc54f906731b976. 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/DEZC62292423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c247d99416abd322750620683246aaa04eeeccb809207e4544cf6e73aa319. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62285942.