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 0xb6075d60d75abfdfda2325c306599fbb50c4f3c0de5161ec9497d54cc0f155c8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38010050-803f-48b9-b37f-4f350d38d622.json and https://artists.proofprofile.net/proofs/artist/38010050-803f-48b9-b37f-4f350d38d622.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 0x7b49e55826f25f608442aed8c94a27119a05e0ec11f7bef4ff392772a3df407e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TRBMA1801006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7326c6f9f898e3dec03ede926fad57a549a5c7f221a10e5aad00cd188d3b01ba. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/TRBMA1801011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb38c51d9a8820566665cae0210ec65c2a9ed32382d512dd1d32aec0d723e6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX452056982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b37ef1122937e8d7fedbe00780bc7c1ddeca3be3f1ac26f6b707b186f6f77e. 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/FR2X42025932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c4cfa281d2457ed84d472caeafcb7a9c487f52b559355d0f36c561e4c8b51d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DGA062218897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c76c02f92bfe96062e2bb22b6f16d5b793ae42a8277866a107121d974b77234. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:55:34Z), 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/DGA0L2397748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a07e32fed195f817bff70cba9d43cda9a32cf7f5487030ce180283cb67ff39. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA0P2354421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c862f23d228ebcbf8b2bf34d5016da8fc8c68c614adf31b2a2444da2331461. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FR10S2512321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4dc3b0080e966899030ab88dc597aeeccb065484de73b9fafff4191d18a421. 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/FRX202588763.