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 0x7944fab4cfb010b71c574731d83ffcf7e15cd25d6dec893a92b5cee73fdb73f8. 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/ea5e6fb0-72a2-4ba6-931b-724a9bb5228e.json and https://artists.proofprofile.net/proofs/artist/ea5e6fb0-72a2-4ba6-931b-724a9bb5228e.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 0xf7afa19f1fd5f7e30fec03abd4b1312b21906fdd5be32fcc3a990918a779ba6c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X1926982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b225b0bb4c833ecdd9aa2f60a11268360b124ef3abfc069d3521e77fc244e7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRX282236817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2389835774955be787ecd8c510dd10d521ac79d94835daf6aabe2ac11e445327. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR59R2385834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358dd96da9dc3da2b31311a8c8270895326bb80d2c81ca5a8926dea640b6ec4a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR59R2385835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd321f76f72714d5e6e0a2a9f5181c2190c995fa74fc175c805ae89eaec65a9. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/FRX452214562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acf343f76d1d90bed51e5f0dd9c8583d458ed1999098d9cbd8c2cbdabb2a18a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR59R2385836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542811add1d8757fbdc0f6de91353cf74de44cd61a917d30a19a42d103666555. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/FR59R2385837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2ee9b50ee389e606519d482fca442e0e160e9b3bc26d532b9a9342c67a3683. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR59R2385838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6991018b3d229f5ddf73078ad7d1b47436384db39fd6663493867fd05d1087a4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR59R2385839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e6964ce4f37ba5a1a2eb79cbe7e76309ba8b7d2d7531bbd54e6de9b75ef595. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR59R2385840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa09ac60d4f5f90dc8680842b2366841ba158c6e7e043c2077cc7eed824cc6c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282232049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b82f5c76bb47953dfbf7290c7a1bb7eb85cea667848e131d093efe175ec401d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA072100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1ffb0b36b2ea54655cac03991783786cd7188b90549748e21343d4e63d29d2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42209454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc0d3761fb3167ac2ba3533bfb80f9a8c976aee9355e7c44bcd9cafd896525c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR2X42248836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7113c39d1f2cbb8a9eae2866e16f3ee0c2f9018fab1f70ec99fd5316b95caa38. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR2X42216691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b874f7e3b5986ccc4f7bd8aa64281f10f593a23d21f1dbede9ffee2d044f75b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR2X42216693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850aba88055df1073550457cb3958c72af542ccfe4f0850b93f46cfe4a3ad9a1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR10S2255470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cc90c12ce32159b94cb463701f71ed96bf3e6e3b3c39453d35d83917658840. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA072113858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb7cace618ac792cbdfd25c2536ea789c5007b8ce42f9b715dd16a41ea5d5cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR10S2190927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8b2ceecfeb1908cf801aea06ae152521fe1881fee48f8fa09ccf1bd877cfe1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRS182059017.