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 0xe5cfb8e20391f4f68b66151692e9ea646f7dec1df3046a9a9549779aa5886d6e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89b63de9-7a4d-4df1-b3a5-a314e04fe948.json and https://artists.proofprofile.net/proofs/artist/89b63de9-7a4d-4df1-b3a5-a314e04fe948.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 0xd7bf178f2f66e45c29fc3604c86a71b106da810c2d087ad16aa31ab1d11a2705. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEQ2108573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd12b40fba4280755f80397b6951258da13d2323da225dfe63abe87733b054f6. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:17:20Z), 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/QZK6G2223644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c686f6c8ba4d515f14b9b2b5db5f93e5511ed5bd30a62b002598c61730a9e10. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES72307586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc89702e45cbba3a3b3faec0cd20831b5e68784d530c984111efeb232a144ef5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBB2492706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b49795dc6a0637ba2585b5f0448d2a95cfe3c0d24813341d8a6e1bb776f009. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFX2482329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224db0b5b44f0830cb21d750f41ef58b7b104c1d7a9b33ebdc7e502bfaeb2666. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:20Z), 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/QZZ7T2485422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10c83bba4c2e81778a391d7ffbd94dcf7dcc1338e75eaeadc73a73fb9c71ea6. 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/QZTPX2546113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94e06dee970f36559284339000ce233dddc9e11a15c7940a4119298faa18b8c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTVM2523071.