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 0x4cbcf6e73296a3fc89fdea3311ee041a7cf344fe7abd585ede3a90f1007c470c. 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/f21960f4-02fa-4a7d-8be2-933d9b5448e1.json and https://artists.proofprofile.net/proofs/artist/f21960f4-02fa-4a7d-8be2-933d9b5448e1.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 0x5ce20c8051db9e97cff1dfa3980d76d3b9ee7aa159008b82025fa3c1c1f99711. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZZOPM2106724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb42a0e6ec7b45e2aee2e049e842d483f943f34c1d01eaf554958dd80b7aabf. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/ZZOPM2107960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cee3ae1eec09a564742a156f222535e6b965b136f46e574b67206d127f1ad3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN42080657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7a7eff68c3e68a3fc756bfa9e5be4a7a37bb46fa51f3f365d87c8fb6274801. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ZZOPM2106262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f6d2c04b254be35a7ababee974d7579e9d05c6ce72a7d8320245cac7dc1bba. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEM2024544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2f9083a651f1713bef3a5b108e1859a825909903ac918af114984b1eb44a65. 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/ZZOPM2220568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7250a22cd120c3f110bcd478e27fcfaeee62ee07a4f994a1030fbf7790d7feb2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:36:16Z), 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/USA2P2346656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bd767ea71e17ff4d15a797ff139f1f0023e808eee1467a713cc92c56710bd3. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/GB5EM2402175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208f3d1f0c607f9de582686e64835f6c1d398830b2babb401e07cd56642db0aa. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:47:40Z), 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/GB5EM2402184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef0b8d657772145633e0eecb682e8db3b953495c8e9ad40f96db046c4e9e6d8. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GB5EM2402183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208f3d1f0c607f9de582686e64835f6c1d398830b2babb401e07cd56642db0aa. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/GB5EM2402184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd647d528938d1adc1d9db231e131566451e6231bd5739d7083283e8bea3d0b. 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/FRU702200196.