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 0xeb9ac4e431b8a0ffdbfb971db688f0cdefa4deea11f942f6ac3bf0e02c508791. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7f73517-0fe3-44b3-a61c-97acf13e41da.json and https://artists.proofprofile.net/proofs/artist/c7f73517-0fe3-44b3-a61c-97acf13e41da.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 0xcae86bcb73b4df4304709f2b7ce956a8f021300630c609accff45a44a1339912. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:11Z), 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/NLG272105416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196be7099e5cfe30f48919f444155c6523755b2b8dde08245413d4e6e9dfc1e8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NLG272105417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1587fb5b665547b52813a979de898bc586bf9118dae14e4b0abba1b7c8b1f29d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:28:36Z), 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/NLG272105418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787d9ce7b8bff66626d6205c30ff0c4a9eff333e0f06eb37db0ab150ce233c10. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/NLG272105419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606d32cbf59bc594b1278bc3b49e3e03f56fa9ae7bcdb5360584e54798d6ca77. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:54:08Z), 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/NLG272105420.