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 0x849a6bb6376a3b08c4724baacac2bc1e9a6549d6147ceb5a9ac56ab41a6d68e1. 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/455bf46a-a3a0-4571-9dd9-88138a13c0fa.json and https://artists.proofprofile.net/proofs/artist/455bf46a-a3a0-4571-9dd9-88138a13c0fa.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 0x264ff767b946555e179b1b905910a0eecd9ece330e8f1bcbee9672125c98d816. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:47:14Z), 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/US23A1540259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fbad37e084139fb7647e40d0b0949e1125452f56d0cec2c29cee9b32b13f00. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/US23A1547076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44da174d0ff4196f951196649af61452ad110281770f0bfe843c110cf4cfd7a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US23A1547079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a51dcfb5973f57f12d4e4542930bb7906d45c6276bcf270d4443b405b7f40. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:54Z), 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/US23A1547080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82d41cccbddeff8939c0452497a82c26f33d947c3bf8e51b8a24557d86b03ca. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:00:55Z), 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/US23A1547082.