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 0x1548b02f7e46662211e2502225295e3ca2c504a40f69102ccd6873c7d308c198. 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/5dbff61c-84d0-4f57-a798-ea57793ccf2d.json and https://artists.proofprofile.net/proofs/artist/5dbff61c-84d0-4f57-a798-ea57793ccf2d.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 0xa810aa05eb006a25f8861af043301b20f49a58d14095306d72b94515422b0165. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARLK51400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdecd91bdc6a19cbfe76a6c3abe3139a5683c5740cca4a45f53f2147a7845cd1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARLK51400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7008424fa9106bba395783b2ea17ab29a217fa7608ff88116f6343b339ba43. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ARLK51400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f847ffbb6496a89ace178e1e0c943f82c0076bd027c755925b5a3411de4c796. 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/ARLK51400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f7f928d4416c5c236dc162a02a9a79c6ebea76b70fdad5585c94f5e53ceafd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARF391501733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b769ec736f17051eb9c72714c7686f0b5fcb78d6ea4e8535487ede2067a6ab. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:36:04Z), 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/ARF391501742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa132ab5f054d2323d9c64248e4b231554b9d74d532a737c6b4c37e9a8c51d3dc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ES71G1845299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f2f334ebb4490e3828205c2592e0b8f966848ccedfba0232761590ab16e340. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES71G1875236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6812a74e941cc82554998b838046470a059846f9891ed34fd63a0a963105f7. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ES71G1917604.