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 0x6a1fb391ea8375c28ee0efe1b27c4061e17f50e8cf42923eb8089fa4ccbc0c0a. 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/b8e75596-9f6b-4218-bd70-8051ac66148e.json and https://artists.proofprofile.net/proofs/artist/b8e75596-9f6b-4218-bd70-8051ac66148e.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 0xe6bc68d768563ba823c54b7a9a6360e5bbd1bd4eebf77393312ff5627d08395c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAGL2244829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034567de9a473ba73d5ef47099e86cf3a933fb33ceebaf22c17da72566e88cd6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAHW2474126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa8cbf4665a4feacd8dee31bf89c1a6997bfefe8282ee07a00a0c9390f58e8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEO1970949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa97349275ee7850ceb095f7271cf512984cd25adcfd071b75b9707770dd3721. 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/NLG661701087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7ac44d1408401309006f5cf234e6b92a508a84169abc47882e9a3ab8b8b879. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLAM41900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5931982f87ef70ac0c141208a43ab90a567b51f125c1b48be420f7052878f7ae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLAM41900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2ad7610535a4c61d857deab0d9926dc1acd634d0a67b7083bf9f537ae826b6. 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/NLAM41900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d3ee66dbe1e048e61a747bcae677706243594e7b145346c10a74a2d71ee9a3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLAM41900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6bf71ae317068152198643b48a153ca58dbaa27fa29604d44e697e1f4536db. 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/NLAM41900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab46af250e2c9fc7caa661f8d682491f9c4f8df1bbdf8885db8713a8190ef24. 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/NLAM41900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed4454764d41e684248caf3563c81f4ccfb8663c01c938ab44b32bbf5e6997e. 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/NLAM41900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc911b60ccb1b871f91889d69c0a7524869ffa40b08c84b955512306f0923dd8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLAM41900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeabd79f41778b4a0273ace536de850fb4baef05077202e47bf21f3a77033707. 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/TCAJF2554663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe685588c5716250a9474dba819ba6080c54ed95f39203e3601d3223f6e69a695. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAGT2397319.