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 0xcd60be9334f48951de34775abffda608b6674e0a32dd41ebca97a15b5f1a2a30. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bf3a43b-a22d-4068-9893-f2e0549fa450.json and https://artists.proofprofile.net/proofs/artist/6bf3a43b-a22d-4068-9893-f2e0549fa450.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 0x0ed271a2b45be9706239bbef5cf25ccdd350fd97d2f198300c46b887282e6a7b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5OM1700801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db8c2068ac0c487d8a5126930a2ff87864f96ce0876b9df784fc9dec134cfaa. 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/SE5OM1800801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ceb1dd3cd432484030f066be7528c69b9f6f2b92536cb687a163cdf0e163b4a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SE5OM1902201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a203b2543f9b0039104f60980404a665edaba2ad45fdf648d552c284f3b9011. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SEUM72001264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c83f8a1dfb6ef06cf5edfcd1f0aa6c57f5698d694e9a9907c1d19f4a47ec7c. 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/SEUM72001448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec284bcffc6665d83f837e0bda926cda37038d6313adf799f1938be89ccac4a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:48:25Z), 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/SEUM72200458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab18406dabc9d75d6fafde340369b1f8d4e94f9e8b8e5831355ea9410b77c27. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:50:30Z), 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/SEUM72200738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12b151a5ed7a396c4dc7a3f7c14d5f10939f0c62769db151a24233370c91f9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEUM72200847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b93226231687ca6eb9fb201aa72de0c6b26e4354b602e13d87c01c019e4a6c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:01:08Z), 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/SEUM72200848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc7b65be82eb0b14f48be26ee543bf84713657a0a9ff9021159b772e5d6a014. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SEUM72201534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7177a05f361bce4ca3f465a7fc955ecd37727e2d58512c7dc1715d774a9592f4. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/SEUM72400087.