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 0x0b25e62e5ac190a225440c2b8a5ee8dc7acecd7f687d90bb801db5d6fccf27b3. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b419899f-8f6e-42d5-8100-eb0aad382778.json and https://artists.proofprofile.net/proofs/artist/b419899f-8f6e-42d5-8100-eb0aad382778.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 0x5bd8a96c348a080df8b4dd3730e6bf184113a9f70f37594f040cd15695875c65. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:49:42Z), 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/USA2P2463681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f76893c7876f52202193ee8f53c467d1b2680f545b858d895a7484c317c11. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USA2P2463678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa180cc2162d3eb1307b214af54a24e6feb0e01a62624aadbcb047e0c0235083c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USA2P2463677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42943c46870b00f9c0ef6c07edee40e5f8d555496d7fc5173d976947d0219318. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USA2P2463680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69479ffedb442b7f124236a961f39bf0518570fea50a0c5e1318484104dd24d6. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:00:50Z), 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/USA2P2463679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77741ea41d1e730f2cdc2506067cadf34721aae6bb53c695e678b5361ecb90b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2470245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3061e3713424b6dcf2c65d422c03f29bc65858b45637227a3a88c91f0fddeefb. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USA2P2506541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6874552719121ef5e4efb13d44fa6b3ee9562f873f8c35a7f972449fe99672d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:02:44Z), 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/USA2P2508750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35124dcb9f5d7d7aa5eaf34daac38cb53a5d14bf1bf8d0527660432035caf635. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA2P2512255.