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 0xd8a36701a586b49ca7ce2d5d463373f19d5667375c382637d4f6b4dfdd3e1940. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e1a5c64-eff4-4347-ab5a-77f3955b0601.json and https://artists.proofprofile.net/proofs/artist/9e1a5c64-eff4-4347-ab5a-77f3955b0601.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 0xb9b9003dd8f16c51325772e0c4f70d3943d8aa12af0208cdac23bf805f8c5467. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHB2378207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe492d0929be2fd95432060ecd0abe26be0f1d4bf20e6e1a6f5e49bf9bb18d52e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:33:27Z), 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/TCAHB2378221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287e29bc0424647937757c09a3bf172eb115f8f03b3a3dfcfb3f00f75c99e9b2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:41Z), 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/TCAHB2378228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cc1d8650b9cbbc3e713b18a030b13697ec60263296d0106ddccae73a4dd824. 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/TCAHB2378233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2fd3d05e00641d6f55c5ea5d6dc67ccd10959672a8ff8cffc7609801d3e22. 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/TCAHB2378276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0146848da2a757e9ad997a65f7d5f127d71d75ea8a92722ac09b4fd58335aef. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAHB2378298.
Dead Island 2 Haus (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c95e75926f44afa9ef5c13e946eae1af5c147f94eface5780a16d4b97f3321. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:09:46Z), 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/TCAIN2455164.