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 0x30a90ef7f016bab597b5cfd09a635990ec895178501f930f14df7be033b04487. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd4fe2c4-1580-4934-a2f2-e38aa7ea24d6.json and https://artists.proofprofile.net/proofs/artist/cd4fe2c4-1580-4934-a2f2-e38aa7ea24d6.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 0x3c84e972a63e2f55dcd1e4bc1c7f3a2ea8268d9b8ceac3ca10a73ba2afea018b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HKG732295543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe27872271571683971d9c447ed21109e617b4765ac8ad69847122558af85bf. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/HKG732289228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b4407ad176f6489876445af4b761463d87e22feda9aca4efa0d0e4d592a795. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:31:01Z), 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/FR2X42377606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f0c99142c7738ef65915151f5a5ed0a39a9b567ded8b8cf05be2d4f8d61850. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/HKG731573519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed824022129444ebb42c91673be255b80efa1dc85a5b9093ca7bdda3d26c5d2d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:59:03Z), 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/DGA062340087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe59141c7f14272c853600bc028e646fa9fdca42bc50aac9dcfe56cbee98c574. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/HKG731679206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d308849341e19e0817c3171d9c1b69adfdc5e2520d25fb16e5cd33f8155e28. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR10S2571642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefab5e66e39f52945e89d8240fb256661160cbf512e1794d974d0b75fa64fbc8. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/HKD012432746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b49839cc62d8256d5a5478cb3c78a0c010b02fc633856df73697f62c2919192. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HKD012447263.