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 0xa7d4c18159a231c5882397b8dcd76210f1840ceff5db6528392f6405d4999d96. 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/fd987a70-2c84-417b-95e7-d4009cff654b.json and https://artists.proofprofile.net/proofs/artist/fd987a70-2c84-417b-95e7-d4009cff654b.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 0xb98012a932b2cab2d66249c76ff4fbc8437f66de4763ab5cbb0c8d6149c843e9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KRA531800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7964d97a8eacd0faf7da5d5b1e43a3aab02dfa75f913eb2c2f669a3adad8595. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/KRA531800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd6d02ac2ddfb5a0501b2ebc0777ceacb7dccd6b07c7f67bcf2aa70be312b59. 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/KRA531800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaf29168188ef1079e5999f1f0555bdae06f761579732f379de75d49056a397. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/KRMIM2473575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f0249c00f2b09078769b2ff9c42fbd742d8da7b263a1f7acc1cc4779330ed9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:49:01Z), 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/KRMIM2516652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a65b5de2dd9a69860b096541d2b58904d90786e5897a64642e026c5be33552e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:18:18Z), 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/KRMIM2516653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e76a9786278ee26a22aaefa85023027b59da059d673a779e22740a6e0e079d1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KRMIM2516654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dffb037a3733842949085285cfda849adb9fb69ec329fd6187ed7baf3a41905. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/KRMIM2516655.