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 0xf519f72373aa20141d7a0bb546b9d3eaacc2f6ad996612c414176091c76719e7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4441941-e8fd-40bc-a3f8-ed87b7d03880.json and https://artists.proofprofile.net/proofs/artist/f4441941-e8fd-40bc-a3f8-ed87b7d03880.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 0x3d38077ebb4ea3a4880f8950525f57cc4ed10e4510b26c7563daaef6600813f3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US4KC1175302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203155adc74c28f9b37d08775581912573f97c7ca4f827f759aa643fcc895f47. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:11Z), 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/GBHLW1801352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e197546779121ab408c94f837300f8c6064efd1e58e4bc1f3e910701b965a79. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBHLW1801354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d751badbca7640da913b90ea8e36db73cba4ff28e14360bd28461783f91bb81. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:16:01Z), 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/GBHLW1801360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271ee4b155776517fe83a299afd34f056a6855b2b1ce01836df0ba01639a1c4e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/GBHLW2300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb7230eb9f6d73b5a44240cf799b4cea0c6fe069d82f2ee9c7bd1f00e5f4344. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZ2YP2429302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c2f9ac0b5eed2fea9929fb700229fa511502b23fa3d78b5d2a545a160d90ea. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZ2YP2429303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc8e6c0abe91e94f79ed3b06ad910b662c4cb5bc8a6c8945118b9cd5e4436dd. 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/QZ2YP2429304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d445e64dee8121ad8817f935910cfcfc430a2248d44a052868d7409e1d4ca12. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBHLW2401414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e6a002f00847fd7523377f0b178f6ea86c21e702afca3858c6c18d486c4b58. 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/GBHLW2401506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb964fdfeace416b2db6a9966ed3ede42a3db4364c07b30f0c98813d6878fbe5f. 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/GBSMU5772695.