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 0x7e72efeaa1145c205a1d339d3a1c4cadc9fdd0c1c7b293545df5ee54ea5fe541. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6516a8b-5a81-4025-b08d-0f6eb0dcd503.json and https://artists.proofprofile.net/proofs/artist/b6516a8b-5a81-4025-b08d-0f6eb0dcd503.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 0x5ada81afae46695da153063f9346e8b1754dd5c783a2ed8479c3f2760b63a137. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:50Z), 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/QZNCB2186889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6874ad9bdf469050a469c1f9b1ee134c76e26e39e52e7cb89ceb66f4a841d34c. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/KSB012300871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2916e2db96fa8f4191629b7182d528a04d09e4863e272b45b7eeb63a3bfe6746. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:22:52Z), 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/KSB012300872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0437db811204c0e5add31aad3357389f72f34498866290229ddef51939a90b6f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/KRMIM2429915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642409462508be698fcba6bf4368ad24fc53c88a1e9203186f3a04275955ffae. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/KRMIM2434622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7077cff64a2963760fd56a2e87710e41dc9906f4b76dcc782a3d8fb2abec51cc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KRMIM2455530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5c19d41907005c77ddd10de392d3edbd4114b8b29927c89bce24cad62f0208. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/KRMIM2473546.