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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8351cf4590cb9dc9a88e21e6028cf192f3b2529658dd9c3aee95f9d889928c0d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6731780e-d227-4656-b5c6-18f801bb1391.json and https://artists.proofprofile.net/proofs/artist/6731780e-d227-4656-b5c6-18f801bb1391.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8228d1fbe054e9f614933c2296db50d2b96333f1b49cb244b7adeac468338813. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/MXF600602435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cbf15485b70d255a67d9519c1915b190e39ef998b2cbc65f39a47692bf5b82. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/MXF600602442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b7d1b96bac1f3ad18d619a605fb77e15d263e157108a70567a9dc74f2b1df1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MXF600602443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e39f1e740840537ca28964af8f4ef26500a95c4cb05ee2890b972f3a9206195. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF600602500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1d40e46c2b982a13365dd578d7528c18ea5509d3e6b913b674e581f0dc58c1. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/MXF600602504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf8ca769cd1d53854d3e49391490e49c1cebc56879ccf95b9c2e90cf449c295. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/MXF600602506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50efb93c5e79375f3404df3c1e821cecc9f63852973fafd9bd7760f8df783da. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXF600602507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b19c3367c37c789c95fd143043289fe9c84aa65f30f51a2ab11628aaa6f07a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MXF600602540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7722159ad48bdefef24028a20bb8882f358fc5afbe0bbb0afec4347f3036d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/MXF600602607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0274be295d00d725da2f65fd1e93d1d81b8af2dc86e5f51953773dde9a639910. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ES7630600916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb690adfc8755fae0ebc84175e0d0451f3fb69bc7ac7c685276f0f0375f2d583. 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/ES6601401309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0d8f70673cc8e1d30c941c65af76dd2eee9cda0f630e00194aedbd5651f8d3. 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/ES71G1514558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f57d4e21c690504ef351f6aab3e4af4a0364e22effad3d6a758b2719be93d5. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ES71G1514560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778a6ef1746b02970cf69537e35ca9dd5557ad6dfb134df268e830b19a3a7f2c. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ES71G1514561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8090cf47bab7f7ccbc3277d1dc7c2088cd89424c741563b7c9e719db08e27c53. 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/ES71G1514565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1c2e81a2f55039712b8512cbef1613ce1e81f2708ef800c526c81d03c080ac. 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/ES71G1514567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26044f2fe8c541da8c5c62acbfb09254067a055b692dd42971d6ec2b8c7381e3. 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/ES71G1514569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc80e02eb3f534646aa4455ee33daa75dcc05e2562189d222f26e82d3e8582f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES71G1514572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce9f53cdb28c97e83572b756508e40428bd157483c30dac054b2baa157aaf0d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES71G1514575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cf443b886fd2df70ba7c21a9398c2cf45689cc0010385e5933c96878e8f313. 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/CUA020215433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3624e1215de5a52d919ec0b6710463421265038ede67f4ece701dadf230a0d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CUA020215480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b1c663e6751dcecd91254f2fdfcf6ca9720b359e4cbe8e736206a35e9619d4. 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/CUA020215483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01f49082ead58f9375297b07eac1d2bb1ca4e7fd069cfb2e857c29168708d8c. 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/CUA020215530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe852a7e20ce0c763b82ab85f363640d052c5b211c1e79f2c32c8a3ee050279. 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/CUA020215548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c0c74c9f360175250a66679609949fe04a4fb07b277ce97d2e46352e54bdb. 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/CUA0R2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ed7c5c3ed59a564820c8aa67209999db32585e06c15778d41527a9a686f191. 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/ES5300714015.
The Best Of Cuba: Jazz, Latin Jazz, Cuban Jazz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae1d8606dbcf69255b989655b801802acc7a23f4b8504e759178d284b3044a5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBBFT0800163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bda8cf4e464ed16d5665e341a5d70213d50d2d07bd8f60f87d673da43742f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5021100416.