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 0x950d0f9f5b0c505d1910f4523da681ec70386a681433886e3398c7d083225588. 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/840ce969-574e-4ff4-9a27-ae52aa940f61.json and https://artists.proofprofile.net/proofs/artist/840ce969-574e-4ff4-9a27-ae52aa940f61.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 0xfa4c50ca39cb17b42b1f8354b056564bd086d1806552caff0cc75914386540e8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAHL2398495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa63c3c8808d52193c8347f3d0fd4c011ba093c831e7f5cab954e44b641b10c0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/INU312300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c3fc953656fb491dc75a273b7b0b016905d3e15e46a204563822db4576f547. 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/INSH32400781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfaab701cc62227c2cd5a2a8c73c54b03f9178d61ca1ffdd2e40e2b9666290b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/INW232400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5648b8b64db775dbc6acdced467b529f0ea6b3facd11e2ef8c17fd57a6695b4c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:01Z), 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/INW232400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69de3540abcc8dc49a1eac0f91e6b8f65cf6314611c1ccd04d18077b549986e5. 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/INW232400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e61f957098fd27594062f6aaefb70597a5e4875214df97637a78499c6152b4. 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/IND832403177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ec14e51d7ed2f49d56467114662a278ab41ba31bd0417ed3651732646cff93. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:33:49Z), 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/DGA0M2467234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd17a6e6cdfa95c45682002e889973397f3c6a7d0bb9aae8b0618811464eb61. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USA2P2469415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e4c52d48b4499383d169a4e6568c6cd7d32700ab126f006329de7e276e8a41. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:18Z), 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/TCAIZ2426485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd473c202382bdea981ff3aa9d07e615993d15f8f5e7199b36ff999be16a525ca. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/TCAIS2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8025b88f63e5ea977344b697c9ada56961fd66ff319ab5a5cdf70997e2afe3. 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/FRX282546490.