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 0xcc078727b78cb8ce53b2b1dae99a8ddad9fb7b29ca14ea2179eb618b49c42174. 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/632ea05c-33a0-49f6-9d50-ad62e0c64d62.json and https://artists.proofprofile.net/proofs/artist/632ea05c-33a0-49f6-9d50-ad62e0c64d62.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 0x2c6241e55bc755dca077c70073c083b4c8b7391c83f2ed4ddcd45d839b43541c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFM2320764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517c6fca6e26524838322edaa1d24c3d60c74467c96bef3c0970f01f6f45fff6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ72447107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c46b238f828702d5bb37ceebe62116a568d2db081212351340ff35abc422a4. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZMEN2499120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420ef82ddc7ed1fa1951d97892f0721fe0533dac998b86ffab02971712f90c6c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWV2455037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941f332ec81bfe4504ac5cd2f1ef7d5cec5326673598a65608e4052c22a348a4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7X2403444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b3c4b03ff9bff9751c599c15b427d18e8049e3b6def29aa21954fd55aa6646. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QT3EZ2423159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bb47b93510a291ce64cc1a28f1465d20078fd2ede5de37df7c016f844c1904. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6N2546048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bae0bb7bc906e94e62a054898fdb8206af62c0610a70264a695225d7af1acc. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZK6N2546049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c2dc047dfaed677ef6466982df1152dc99adac528ba0bf932d0032109fe3b1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEQ2523898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c5e9ef47b259e4173307738d8fbf3cd09a18b713cf50c1c20e5800a73bafd0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZMEQ2523899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc33f7344e50d8605d42723e91c5c96b6e3a917c6797e631b388b6a5f7d48fc1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEQ2523900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc05f5381cd568e81a0eea06d293f172ed30d88606428b7df199cb2083801ce9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPLR2561800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985fefeca4d23495e5670908c8240100e0cffc8416de602698310d9fb16464b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLR2561801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5bf126b434ac1480961081582fb1fa50d81ad40269070b499c3b46d2daa8f4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:13Z), 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/QZPLR2561802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c6bf678546122421f97cc85e0e8006d95e747798ecdc1af334ed4daffd7f78. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QT3EX2570311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba0e9557ae366ac390a7f2d855908cf342857dec8ecfdb249a416aed0ffe541. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3EX2570312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe214584d0599f4854c6e347a5d6aec27ac16fe75d64b421475d32163f192a4c0. 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/QZK6J2437005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a809e127d9a0da0f5867c3313e59d85fb782b359346804b093dce4a22c18d62. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFE2380971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ceb5c77511a7e92abcd5364c823e27374ba5755b6dca05aeaa1e26d47245f4. 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/QZRP52470571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658e1f24d0f316873b7cbf2fd5f45509116de1677b15a3f7af05e14b94f90cf8. 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/QZGLM2572373.