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 0xb6b098dafe009fe2d3c666e213e62cf955aa48fe98dfb2ccdbbd98c843388d9d. 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/88bb8fc9-06c2-42cd-a311-5c90fc9a7ac5.json and https://artists.proofprofile.net/proofs/artist/88bb8fc9-06c2-42cd-a311-5c90fc9a7ac5.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 0x3b369f1c4a844a48a263847a60f0d709fb9a1ba6db8bf59dd02966dd7fe41076. 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/TCABN1300640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f7116dbd5dc7efcaae02df72c42af3a8da55ba5c94df58f9902f68e35f59a1. 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/TCABN1300926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbf96cf232a5aec71a339e4cd61eb11af10cd353da652771ba5c179607a0f16. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCABU1439091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bdc491f3d090bc1a103cc04beeb6226ff6ca1d59257402f2da65b8e4c5e8d0. 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/ROCRP1905208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83a0bfc0b1fb84fb55d34c193308172ca9e859975e13d24293eed57d90d9a29. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:26Z), 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/ROCRP1905254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396499b1c65dc46d24f2ae07a0e48ff275c60007c6b19d1ce5017ef02c62c352. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAFF2031627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05bfd110df768abd61d79380e1635fb086f898bbef21a8ba8175098feba20c2. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAFF2031649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cc10dc4e3e794956c04631678be8c82e29f30e624303dad0bfb67229cc7ad8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:59Z), 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/TCAFR2126980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e26ddcc8bb497152351e7932c663d05550b8d8e6542239f4fc095ec61d0e31e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ROUM72400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17402d4ea2f399f6c5963021e1c2c6d272aac979231ae02530ba526a81ba1b5c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAZ2201336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44876ebbbd249887e395795b9c85eae1b11c89bc6746562c1ad7a61ced51a4c. 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/QZDA52267179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bcb2603c8af06cc5a0e54183db63f1c22d7cbfc02f07da582c4632ab3ec150. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ROUM71600025.