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 0x4e20a7362fd420c988d33cedc6f3927fff93b9a7d5ae820e53f21d10a2624aa1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0fc76d2-dd8c-4e2f-bfdd-27ed91bdcb38.json and https://artists.proofprofile.net/proofs/artist/a0fc76d2-dd8c-4e2f-bfdd-27ed91bdcb38.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 0x964c17eedda8f0b6725acc00e825db6eb02053f49afea7f99e7d46db58b48433. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:07:38Z), 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/TCAGM2272515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4028cfded25cf8d631fb8e4dc511a52db0224f8303256a04ce1eb356a0a1c4f1. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:37:05Z), 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/TCAGR2217146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1a64e7200e334852bf6156a6d7714a6f60e15ae787e3a997008c8ddfca29fa. 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/TCAHJ2378466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567f5f9ae9bff333bce7e8259d3110f6ded8348b380411715aaea6fa73ce424. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:54:47Z), 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/USCGJ2581791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c26b567a9bbb8bf1ddc19bfb69b30b2c06b47d73dac7808241374898376680. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:45Z), 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/USCGJ2581792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567f5f9ae9bff333bce7e8259d3110f6ded8348b380411715aaea6fa73ce424. 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/USCGJ2581791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c26b567a9bbb8bf1ddc19bfb69b30b2c06b47d73dac7808241374898376680. 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/USCGJ2581792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e47bf6f11f89d03fb5d6cce2ee1daf04be11cd2b4d82d849e7e66a43c3a2b9. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/USCGJ2581793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07421d9a3e1fc35b960d7ce7f1b4dedaeaeb19c5940f24283ec563c654e389f0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USCGJ2581794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1034084d1e0f1c88c70c3b08d235206660b65ce3102316ac1f0a216bc3d5e3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:34Z), 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/USDY42580102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3a83e0a1a9ff0d8348e962a422beb2462e8f2f0cb4a9048e9ed18ba6976703. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USDY42580103.