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 0x8b3b9cb5ea199a03a4114bf4ac54f1f7cafab75899d95bcc98f0783397d94158. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0542947-5e6c-4342-a525-080f61accf51.json and https://artists.proofprofile.net/proofs/artist/e0542947-5e6c-4342-a525-080f61accf51.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 0x1b670608807289f6166cd775222cda3624567eda2cdb0191e97b71b868b0062a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRR2M1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b2a2974a59bad24ee4f8214e57de2b4a44a9d3325d82172e9a51cbc838297d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXBVU2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382bf37d84288264e4dba2d56fb8e01f7c1493ae3d82e18dc77aeb9fe4264045. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:34:38Z), 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/BXBVU2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043dfecfa16526323d582e2d042adc85041d72476c144cc5d70ae305794f96be. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:56Z), 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/BXBVU2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bbde8dea59e5fb4aa214b72597ec87b36624ba3d38bb595ded1d242d31f2b3. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:26Z), 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/BXBVU2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e37d036d8d3ca3ff54a890b9e03881558aacdb3421b57ce0aa00d58dffc39d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:13Z), 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/BXBVU2200003.