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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ce5cce5fdbd3c53a90444b7b911e7e478b376cc41c823f5d2f424a84d4d369. 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/59f145d3-e2ae-47cc-9607-c8506c112982.json and https://artists.proofprofile.net/proofs/artist/59f145d3-e2ae-47cc-9607-c8506c112982.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89639af901e96d923c7333420555273b92411c28410cec87cf3e303bb69c7de. 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/QZRP42154215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b073ab850937bd4baa270847f70471c3605143c83736f6dffc1e433c9f10004. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZFYX2262329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b15fab266063c1c25d7609b6e3da7016114a5a64d306d234305976c8e3c574. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:56Z), 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/QZDA52271029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e5ef4b296b95e9b5265435d4d3809bff9e5018376ff24c5f76f343c6b754b2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES62262579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c2109439cdf7cd1152bbcd3d2bff777ed2fcd2070039ad90cc75821ac12130. 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/QZHN32299899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80660be36a649623ea80b997734f24df66c64f3978616d153f26f61d279257b6. 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/QZHN52233659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbeddf4547aeedd29587da62900c176f7e89eec127b458a7256706614fb1963. 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/QZK6P2210745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f551773c2ce0d6012512db5e7d521780ae2e48521144d7cb4b85631f4b2df9. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZNWX2212905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3192b4d25b17c087f5f36e964530a10c378fb447573d11ac4ef9017aef5eb23. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZPLS2209431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac64c1a8bac9864371b82352ec0a9fab05f4cd8c25456432e841f43e93fcfdf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZTB82294549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7706e804f84fa87760cd2e6bf51b712f6685fd341bba395350adde7380b60ca0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:46:02Z), 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/QZHN52355624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360d7928a378a7398dd6d40290a72d5bea23c3279c47004960d3d4ad1dfc4cee. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6P2384966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41916a0d1dfe7e4945c5b5770cf4027664e54efa99f307c8558798d90a10835e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEP2316978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bd4534f7f57ddec2fd762ae9acc64c1b2626d4ad541fbdc858a756f029efe0. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:43:38Z), 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/QZES52400716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f572bddbcbf2109e820356ffe65451151359f7d15f157cd483967dd1ed1a980. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:39:47Z), 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/QZHN72449707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d551e82a9a6ded5f9ec3219497998e0067f6cd3355a98418d9b7e0a2d0d47. 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/BX6IQ2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8f9c99fff37bb6600a76ce80fb5168f6a8735ed716c6ca817b24320b9de71d. 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/QZNWV2481853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0504d18f963706f7f9de8494843cccfad2164b4d85fd8579116aae9b8a1c9912. 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/BX6IQ2400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cc8f5a020235eafc519deafb807a0da5470657d2c13470f3a873ec25f40256. 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/QZTAY2474122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89fb046d328495a2ef6041cd750932179ef6f3c071bf3263d4451a135f60633. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZMHN2471304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb3d224d3851cef385c5f3c3887ad000f4abe287a63495c582061b58ac4e1ee. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:38:46Z), 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/QZWFR2401423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a123e1956e3deaf0d6fe792e3c46fdfa839d0d41ef6702a654289d1f878c1d8. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZZ7K2476456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795b10450ac1dd9b4ac3c9647b2d935de699e94158a6231fd8c2e3987c65cc36. 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/QZFYY2588032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd68c46851b7b10e2dbb5add85d462a304aa84cb08582f1363ab7a75b183c60. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZHN92554068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fcaef7a761ab3601c268193772ba9b77c8d992a56d8ef5a84090772a10cbe6. 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/QZK6H2562848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd3310e3a05da8ac16b848623806391c63cc6ba6a804a05ad249e9fad685dff. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAY2523422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb68cf8a724cd8aa7ab47489be51fb65529e47babf25dbd9531767cbf3aa7e2c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZWFV2562042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ac18d498a6e8fc1b4a1b403efa73a9ba7703fc460789b5e37c86e66bf7d7a6. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZZ7U2553376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7830536a1d89406d29320289495d05734b5be029a4f5a7c969e7c7e227e26634. 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/QZZ7U2553378.