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 0x0f30eab81f786bf10d5b2832a971329cc516456b09f8631b4a1a54e847c10b80. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b62fcdef-3e68-4402-a4ac-6aa9b19d7c92.json and https://artists.proofprofile.net/proofs/artist/b62fcdef-3e68-4402-a4ac-6aa9b19d7c92.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 0xc55c75c2fa0ab58dcfbd9a7803c3cd3ff8928501e4e918ba56282b9d4238a242. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA370689116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78deacdac74c4c4b30cae21e96c72016bfe22ab27dacfa391c0e78888c6932c8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA370689118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14225f58e7cba56c94eef27a1f65f79d1383a60b5efce7e5809b93840510bbe0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:55:46Z), 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/USA370689119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb93ca74db12b473d1e21dd72c2ae7207a626330864ebaae175347941e6fd56. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:57:58Z), 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/USA370689121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b3492315a21f97fde8757724dffdb2449c2c6b10efd84be82a03812c3c49d2. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USA370689124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf52ecf494705e5f6ab45618d7a2f90de807f64df41f3f00c5ce9f58961e8c5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:12Z), 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/USA370689127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad058df6bd5f3d8a54c974505c2891f3e9135ce5381d3a61e01ce4e54950a490. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USA370689129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd088851c95981c989a95f1e6dbd0b913f2b9a97e0a1a25040397c3c88c171328. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:44Z), 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/USA370689131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4788fed3045f7c23214bcccb4e787a382a31eeb8998bc9b90739f7ff1f4f59b3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:47:39Z), 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/USA370689117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd088851c95981c989a95f1e6dbd0b913f2b9a97e0a1a25040397c3c88c171328. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USA370689131.