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 0xe362bf11951fcefdb249ac9b13ea1f12a2322a8f39a1008b014629dfd79eda77. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30c7a68f-c636-46d7-8976-6a6fe5e43a82.json and https://artists.proofprofile.net/proofs/artist/30c7a68f-c636-46d7-8976-6a6fe5e43a82.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 0x428a645c6d6e6e7309a124eb9f80438c407a62b0a621fc068766165b44f4e35c. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLRD52419244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15643ff43f50cb7fc56405929242f0d736ee07caba60876943f9b18a5be729e2. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/NLRD52419224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59e6e939019bf69edc47f070ebfa581ab24dbb60b093d0348809235e55cfadf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52417839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fcf7824ab7b538d3752f8dcefe5c87583510044c1e1fd3e04b5d506b774f78. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52417819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5d78a643bb3110c1ccd924bb022cd944f104289f926655bd529548c986c833. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD52417801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65663b5c33d4e6fc7b3d00c88d5c09b92e61e65402b0fa08c8d732158e81abc9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52417781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb765c2098dd65c64c1344607717b409c47cabb750d4912246606ec3a9546e1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52417761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a766f3a0e5f553995d705a87365cf8d9e39a3ab3ba1bca64764b05e8c30e38. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLRD52417681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0be0b5759ee5e57899a7ae7a594cac53afdea88145790f9faf3888b01d7e55. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLRD52417661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b14da10027c58dca8c625dce98e3452c1100b96578bd6846a336c2ea7638db2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52340681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5207a864c207919fbe0a2c251637b9b6cb0b953807ca32e40d400e51002db1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52340663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3464e5d049c815ce102322fabae7251f5646b1fc119d0bab0294b7a055421fbf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL3M12418664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eac940837eeebe749098873394528aa0224a1d3787864a468573e0c2e140829. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL3M12418641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65448b73534e2dcbe1c6d06b3cd6f92a542e2d030ec7c8754ebe0c023e228713. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL3M12418624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284a4d6cd0a69d6906a487adc7bb8f136eade9bf22bdc988f180d0f8d9a4673a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL3M12418604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c216a0b1513fc5754f69a4988b2790bc60b7c3c7a37878722e66a809596900. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL3M12418584.