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 0x57eb59ea4659c5b1f807d801d071d95f671b7774c01abb360be306e16acbc486. 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/e32963e7-7108-4f12-9f1b-81579f976e3a.json and https://artists.proofprofile.net/proofs/artist/e32963e7-7108-4f12-9f1b-81579f976e3a.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 0x944c5eb3b5754cb86ab5b62245cc5b9d4239bf102976ebeca4c745985841d17b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:07:01Z), 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/NLC280100289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4960e4b89e2324316fb0a97aa29446c9a5ba11ffe86090dfcbf03783cd805e0a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:34:33Z), 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/NLC280100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf40b2b84fe4ae71efc28f264e43c6879efc0628c9e6b1881fe1441ff78baf6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BEJ010400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46753f65a2871b861a3fae58c353973a9532a7d1d9a3896c5db05bf24bb642af. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:07:03Z), 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/BEJ010400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c57f025438ab89449928ba2fe584ed736a9c7106b0917ab02729c517a54eaca. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/NLC240600084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb93590301f22011bd8aa0534a9d4935579bfc5d0faf669163fd3c81f28b302. 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/NLC240600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dd84cb999dccdff94d2440e764bb4e53be484b8e2c2c585c7a00da7f819363. 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/NLC240600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3d36c4de1902819842ded5d45f293b8372ff263cdd46b06508c2ba517a4c34. 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/NLL6R2203717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e208eadebe655ab3ff918d5da3afffc6bbef9e12ecce2cb8ac2e3a9c30726be. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLL6R2203689.