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 0x3c78d36502ade36ec824dc6dd7cf7e260f7ae81747de2af7948130de92998ebf. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21b45ed0-f72e-4495-9699-3e8c1ea77442.json and https://artists.proofprofile.net/proofs/artist/21b45ed0-f72e-4495-9699-3e8c1ea77442.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 0x7ea4f86551e4de4c13f42ebd64b64017a72f61559f27de84786b9293df56d673. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/HNA012318001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2c5499df132cbffb98777844002ca4be933250d4a3dab1af9a7eac04e4f687. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/HNA012318002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59275d7ecd10512ed843dd94e555e21868f04c8d7cb589fc25c27b4d7fb904ae. 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/HNA012318003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200331902e6708f1886dd181ce0761a5150e3aaff895caa7a664e3740aa5875d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:53:37Z), 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/HNA012318004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaee376d9a3cfbcb65340a373d7b839a9adca444d7433f1887bda6c82d98d25. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:40:03Z), 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/HNA012318005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4f1307cc270bde52fd1508f1f8fd20908acea61170d2abd29c0a64f0de0b50. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:27:37Z), 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/HNA012318006.