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 0xbaef07b3fcfb875a0a08fb4704f22c931d4a6ecb4f2329be89a743d6a8830288. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55975364-0bfd-4351-9db6-fc72b289bd70.json and https://artists.proofprofile.net/proofs/artist/55975364-0bfd-4351-9db6-fc72b289bd70.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 0x734982464e6bcb7889db13a0d036720b476ddc63b6b2bcc8f9b51ec411b4553a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:32:33Z), 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/QM6P42143669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfed86d456aa5e9ae9bb9ac079b7222d539c95ea3381618c5d0e89297e7b7eb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:37:17Z), 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/QMDA62156969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794952040fe68b768259a78c0408f130b719fa52389176e5128b417961616b06. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA62284118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8821da8fc5803aa685497bf739d61d9dc4b82cfe9390618c15484297269a9eb0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:43:46Z), 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/CAQYK2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4f21026554b56635685424dea44ac0ad747986444c956e97c52b1a66df64e5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAQYK2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24161a2a5615c706cb23c59606bdcd49048672e382945017791c4817ff9a1ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTRX2445289.