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 0xe064df021529eff6dfedcd1c768bd027c3ac42a1a6a5f7881f3a9588618b774a. 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/2240fea5-253b-48cc-9d60-e3bb1a0dd78a.json and https://artists.proofprofile.net/proofs/artist/2240fea5-253b-48cc-9d60-e3bb1a0dd78a.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 0xadf1fff43b71e9d1d3a6f6ee8103dcac01e947c2d456001dc76b04efa7a52249. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DECE72006497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc5e5efce1db142707a5050b1731bf41885b0c74a9e71d2526687a3e7172c14. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DECE72100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac4a75cad16038e7933a5f824ec29c041dfd432b9270dba0377ea488e35718f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DECE72103227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb64c18438dfd7bf03004d12597bd04b52c5f67e9ff25f892a6132bd86b5ef6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:44:10Z), 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/DECE72103803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11db081b561bfa1cdcfc4bb9663b7dbf0cc82def0bbe7ce041450e9bbb78fb6b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DECE72106277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c0c96d2c11e16cd8c313c2a598ab985523807ee3788e059db5fcb64e6f9ae0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DECE72106424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358753b1d927e0645177b9b54c63809a0e9b93e53ee01dc9f9cd32dac7267f41. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:54:57Z), 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/DECE72201932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4cd979477b6d085cee3dade0c3b59ceb1b05e652b605cf52377fff312d1ebd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DECE72202437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600c446b65f5581fcdb36b83cc152d899dc4af26161ccc3db95c428ddc2d9673. 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/DECE72300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5db989882dc74ed55c5be963724cf2b17bbd0f8ae9bfa01220143e98c8c343. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DECE72300638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f20fe9f4238e5dcfa5fea32752e7da6cf8919d4e62510305648e889d5ba3da6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:42Z), 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/DECE72300622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2567e7a0828d0557a2094eb0abd10722424d9c9ebb02599c3053c3a39b93712. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DECE72302303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad889d6fc546dd5b1c8d28e7038a032f1f53a507b46d3fbd19325e8133159b2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:25Z), 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/DECE72303632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08fb202bba70bd145f85f90a47ef7eaea67ff7213415c7fba6e0d3be75b0b05. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DECE72303458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a3ca21aad8f7248f9f0573b0f04fa1edb03e72071c72e7628000bcfaff2057. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DECE72401983.