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 0x2a5140584b69e2cee3aba002abb70d54186a176c0da9bc3cfd34dc5110dd1e70. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/457dc78c-d237-43e9-af8c-551431ed6006.json and https://artists.proofprofile.net/proofs/artist/457dc78c-d237-43e9-af8c-551431ed6006.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 0x17c3c13e65a47142a75c634660330ead35d6d07badedbf414224b7486ef51725. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:31:55Z), 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/USHM91826298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324f157b5c00a45cd28ec5177eb22ea34b50fb8fd03a5222e12d67b612d171a3. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:18Z), 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/USHM91826299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b3d66aba691346a68e168632a801e299cd4c2a8805d861119d81fa3930aded. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:36Z), 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/USHM91826301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20072d3da0e71bc120d46822437e652f07fc31ba10c3fdbed79aed96e67564b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM91826305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaad8fda076904fc5c259da302c6c7959fb6f92b16162a0d46ad8ec8f0322541. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH1916649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe967070d5851fb4dd301a0187315fdafde89566056c77a111170dfb0e460046e. 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/USCGH1916652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d62a40bf8b48b0d591464c6f8589ba9f04bc8d4a94caf91f3d7f2c7c35807f4. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USCGH1916654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd090ad821ab48f3876319d7d54021e9db0bacdc0c671e78ae19edeebef406851. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:45Z), 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/USCGH1916655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce48e2bde781ac99ff9abdcd2d79fcdfc640bf5659e62688b2bb9d950866d02. 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/USCGH1916659.