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 0x1cf9cf61a1c89bc06481ff7656c24c02124a888b1aae130572d27a3ddc56c915. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3cc700d-5d5c-4421-87ae-a4f50fa3fd16.json and https://artists.proofprofile.net/proofs/artist/e3cc700d-5d5c-4421-87ae-a4f50fa3fd16.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 0x85bab5bd78971ba29a17bc0a2b2aa35817dd2c2c1a202c24bcd2f3008a7261a3. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:54:40Z), 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/NLS6R1864025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e56ae935d022c7c428c3f2ea78c13840695fa815478400e4dff02cc18398dcd. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CH7811933089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cada51a6367acff208480d93e8ba975fd4a829fc658cbd5507b96b9507688dd. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:29:58Z), 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/CH7812110118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b644cbf3297a5e7ebd6461e31eea8a9ed0af4b99fe21a606ab5ce86e7fa777. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:52Z), 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/CH7812110122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971e2449f082cfd4273b9b1b7fea4a2c0930f652fa8a2651242c0e40fc921fe5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CH7812110124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a74817d0695c207853954f3e4d4a17c1f859a26785c252c105e287b0e2ea5c4. Chain 2 (Bitcoin): anchored in block 957846 (2026-07-13T10:25:43Z), 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/CH7812218662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d4243d2beb8190eac802a78ad6011ceb5319b2bb623c8fe5e7bc6e4732e817. 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/CH7812548258.