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 0x7e457bcef6bd424b07697bf2c3f0f133de672800136dd54055006e9393755ef7. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a049a4ef-c5a5-4d63-bf95-4499342c6c99.json and https://artists.proofprofile.net/proofs/artist/a049a4ef-c5a5-4d63-bf95-4499342c6c99.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 0x7adc15cf773dbcb3dd92288d17a751f1f614605bd435020e273d4973d8c2c147. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CACWV2575036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349e8875f43ccd2cfc3097e31aee30a871dacefaa76258e51a3fc50bad73972f. 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/CACWV2575037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fba71c12ce8170854b116307ba6391fc2f6b785c7dad892af8e3beeee198495. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CACWV2575038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b2bb232e136479ae79af74ba31cba86812b718c6edf663cc12e1b955fa3b97. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:19Z), 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/CACWV2575039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390b2354d850dd25e074fc69f1d9e34d75606b9a8984985530ef13af3f622367. 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/CACWV2575040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99686f54e270611c737c8ce451a68778c00ca8fe65b399e6770f48bfe6210037. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CACWV2575041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5468da2033420524de016dbd82ffb25564f144d0f890a9c517e3e74a3fa9be8. 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/CACWV2575042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0349fcc89d2f18d184b5989cc2b1c95504453fcf0ca35fa62b3c6b505e7aa1ad. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:26Z), 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/CACWV2575043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa75a194c62032d0be8b4a230f435afad0c250905290442159c637e39b27cdad. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:36Z), 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/CACWV2575044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65f9891bf237e1a94014f4ed49d4e773407d840755fc21d6eadbca704bc2121. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CACWV2575045.