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 0x9cb3715bf112b6197c19545e2bd606b740e7238504a7f7e28f7b3e9f9f7a60c6. 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/c065b57e-29ad-4d97-954e-47a305236fcb.json and https://artists.proofprofile.net/proofs/artist/c065b57e-29ad-4d97-954e-47a305236fcb.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 0x064cb324cc9bac88502f95833dbf167de5974c9550fc04c4326e9d59a39b694d. 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/NOFVH9512020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851dfd8f7de974a8f65c8ac9a60137e132db38e25e94a42f181af99cbc4f3671. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/NOFVH9628030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee114636deaf16d79e20c149370f95c51ff5099c074b357b70806557abe86c6b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NOFVH9628050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708daf574ddd24d936f6695060d24dba17c0565fc134c78655501119833c08b3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:14Z), 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/NOFVH9628060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e650b3746ffeb35806988105d998ded092313defe71e3581e8b8ffc35ffe671. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NOFVH9628070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a95ba87323bb1cb585760a31d8bbead4c4e37774e3e49d4fe05421ba5631ade. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/NOFVH9628090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb1e230f1df490df35857821a09350b971519b7bcfdde7a002d5ccb32206fe9. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/NOFVH9957020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c36f7317e4e95c2678f7c9d2d20872980259ec1c88d0194d546ca87661a1346. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:24:13Z), 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/NOFVH9957080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c6c4c08e5b3a5376442b426e626172e304103f5f5d35998fc6bc5f8ae16cc5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NOX9X3649805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d583b2b3e3c46430131e9a796148efb8235f961c673bbc6150d69b28a10d216. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMDA61593387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6caf0366fb15bd30afaf164bbc82d54b141f0df75f6ef4f79a8b7046cdc61c3. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:30:37Z), 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/PLC171900802.