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 0xc454b9553a1becea3c8fd9ec099374fe2ea8d7ee48824925c62780873f1583bd. 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/61d0c265-d483-4d8d-bfbe-c523bd596eea.json and https://artists.proofprofile.net/proofs/artist/61d0c265-d483-4d8d-bfbe-c523bd596eea.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 0x13c62a6cf61915e381cc2b8a485ed0c876b8d17144fceb0f7b2dbc9d1e5e15cb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHNC2279452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc580b2cd22a2bc2de4c1465bff56b22981408af006cf9fbf3601bee6568251d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWU2229395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f8e4793e1d79d1f4eb9661508e3c0f1e8a6366d305d44a197b37dc4a61b8ea. 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/QZNWT2275310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f29c76836e568632f684ea2d4092bd5dccc41856f116f6ca7e5a2aff887404. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWU2257473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2651b07c1dac784061b9d03d822e1a49c1ea951abb8a0ef538863bafb1fa9ce. 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/QZNWU2234542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d900bc635a7522b5bae339064a7595dd72cb6a455da7890508de296b8f3853b. 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/QZNWV2255947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604e03a9a7c3a8e32abf6a6aacd220bde0e0b1fa60eb6524111853c08bf14640. 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/QZNWW2237376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da151b846b79058e590b4616693d61bdc259925b45dc7ba5c02969688307940. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:21Z), 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/QZNWX2280204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda620d77f451f6554ffe53916314fd01a5480f4cb78fdd5c7b0c1d3f5280cb60. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPLR2270638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46294a1b697ae4ceaf4f1919c673dc99131b08e3e81e40df1b5b49370487b84. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:45Z), 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/QZES62332741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ada4bc895c02a1c15dea0f1dd8e3e04d5819fffaf7bf2a16061680dac527062. 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/QZNWX2345836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581b7bc10f3830bafc68e1550440b996466892c812564b18af0e6ca6a71e5ac5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWX2348274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd315cd68936fd644d9a5b0d3b170622c53a619d4237566aa8f7c93e993a33953. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAS2389152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efda07f5c83499c25b257cf142fe18164687230f5cb723de36e0ad9e8f6dd39. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:23Z), 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/QZHNB2499111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06416ea36c184f3aad7680512a11af0a72bab9537c4361e3956782c1291d810. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:03Z), 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/QZNWT2424362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0ac1510e9a0c3296273657be8259fe22c7388fc7e9203b581564615350c11b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZTB52464159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4079ce4687db38333b75caa9fa78c71b0c997ff96d0e396a1d73e926deac42d2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:24:56Z), 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/QT6E72515423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b30110619f34f450d8e9c6638c438726f5fe639a27432d849d6ba818eb1573. 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/QZDA72326935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ea32725d0317e105f8f49564186cdbd461da75680e3a85aa9004ff6e5be138. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEN2192752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11522cbcc8710537bea3b6358f4a017ea25f9b44e5f45f0dd2829550c9e1c923. 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/QZHNC2279182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be16eb3dccc5fe24e0af928bc1732ac91fd0920251afe392c7931fb219238aa. 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/QZHN42171078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006d68d8c0d1053ba03a76057c9ef01e5e502a1d288dc2f37e14520540b24751. 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/QZN882508480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d414577e11cb1cc738b6293ea3785c27a78c22ff0079f45a5402d54decb64. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/UKXN21914765.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch