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 0x561390addc101fb00bb03c814433fa3457e2e02fdb6fd61f614b1f011e9895bc. 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/fe17208f-2f38-41ba-a666-625dc4c94ab8.json and https://artists.proofprofile.net/proofs/artist/fe17208f-2f38-41ba-a666-625dc4c94ab8.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 0xe3e6c186a68fa8e478ca26593cd921a2d932a3ba1e1ef9200e26c674e0f6ebec. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:23Z), 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/GBMFG1200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29df7dc8524b46af782eb3e8fd16a942c7d21e723ca5da8edce17ef4b4f353fd. 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/GBMFG1300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc66a681cf87dbd2a8a4739af57b2306c657ee2a54d39054ad5175a96ef7cfd. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBMFG1700672.
Battleground (Liquicity Drum & Bass 2017)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acd3b9da2db3aa35dfbba32add6d76b1615768bd1da46cd5db97ad3f2205382. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/GB8KE2504802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eb502b8cdc59be93737a1f2251ce191395c055c148fcfabb642f362088297b. 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/GB8KE2523406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64518e980b4ae9ead50dbd10f89f13479b5433a2a6165b7a457ca78a3e0f928c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB8KE2418427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e44c809652681c84a9c0e94b177f7da479bfa1d6293e92a4a7a016e9c7c7f06. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMFG1800913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ec8dd0f76b16a35866f38e403e25930be40588c8843c28a6e3664a0c78ceaa. 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/GBWUL2304417.