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 0x2321e249728e9a8e9ba4c5b8f2e593742f5f75e3f228eea190fe4f23b0c46b82. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be70df4e-da8f-4aed-9510-1d0255cb56dd.json and https://artists.proofprofile.net/proofs/artist/be70df4e-da8f-4aed-9510-1d0255cb56dd.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 0xdeeb56afc5d5aee8d4da5dbe501cc307e0d384de07198a070758c57f3b74398c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:44:15Z), 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/CH7812542049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa301fd4aa00429e19aa12ac2a0988ae460917800ea3140393854331ce0933cd0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:24:21Z), 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/CH7812542050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4240464c785f0197d8836349bffd5c19384d64303b6dba429f1ff86d1e133334. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZWFR2515551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0c1701bf4c740bde882a31ea7ceebd2a9b9863c9f818a4a1edf98f7e4201a9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:53:38Z), 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/QT3F22519951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf961af86fb3bfd7b4b8a447c111461c688c89f68ef46b93e3a78bdeb9de2e490. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3EY2541894.