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 0x6ce2885bee35c0aaeecc60df7dd3f3f70a2582a278aaa713902c28655554b5c3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b93327f0-3f56-4702-aee8-34f4c77c0a13.json and https://artists.proofprofile.net/proofs/artist/b93327f0-3f56-4702-aee8-34f4c77c0a13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Total War: Three Kingdoms (Music from the Cinematic Trailers, Vol 1)
Pine Trees and Cypresses (Announce Trailer)
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 0x7d606d8f9f5f4cadc626f29012dce93b27ba394dcfec3aed9834f27c975547c6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM92057390.
Fifteen Started, Eighty Returned (Cao Cao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1820b17ec066590f37b9ec9fa9694d7c657edb20780a9bec651f658f41c3cb5c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM92057391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc80d2c55bbc2af55011a0723bda398c4a3beaaaaf7fd143978afc7cae4874f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USHM92057392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb386b83592a3c73387554782618c1852eedf86724bb88cec87a2ed6e1a7018da. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:46:44Z), 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/USHM92057393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaed98fe93191fb45308615af61e805e413adca3b816844eca8ddbf111b359d5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM92057395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101a91a046599114d824ab96a28deee8e41736b4ab703752b46dcab3a486999a. 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/USHM92057396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab48fd8bd0c254c2e895505eec282aa11d10a010c408e9cfa50c9ab5e9ba4fc4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM92057397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce54bdea99a4b44872bc72ac5df6c198a21e4acb5aa12171f5304c11e666b15. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:10Z), 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/USHM92057398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923cb8c65d0b79b485222b73fc74bf8bced75e3f2c488f13dcb2bfeee2d7b192. 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/USHM92057399.
Greatness and Wisdom (Mandate of Heaven)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf54fdd39e9e3cbaa48f96a4885afbbac6433be00dbefa026308bd27fc00b5e. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/USHM92057400.