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 0xba0ff7dd31a745d7dbfdd1c9af385b4e617764456a469c6f451f6fd0b74b15d7. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/056634a3-5814-4a03-904a-d180593e0165.json and https://artists.proofprofile.net/proofs/artist/056634a3-5814-4a03-904a-d180593e0165.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 0x89426934f05e1b04e16f795ca20dc5e39d778317e496ad7227a503b349343389. 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/BR6YG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f43cfdcf1eb13bf83076a3b2bf73c97da152cb2beedc795d5b52b64c1e11d3f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:10Z), 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/BR6YG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8007ce90f7baec4538da3c875af10603d379c95425337fc05737c6fdbf93018. 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/BR6YG2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fa3a9b2cbe859444218d193cc4118920f99822ad0cbc5f2d13dd50b43324e9. 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/BR6YG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9031a3c6a83748699f2b06a694294d720f965b8a7771f68edb38a6d5c39a5df4. 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/BR6YG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2ed34daf5a57fbec17fe809615bc06f2b3ef7517e13618e00039de0a3475cc. 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/BR6YG2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefd4b958809a040e08d2b3076091072b3ce40e56d593a343828595fbcd83069. 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/BR6YG2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf477d15f42334f71f8c1f8bf2ae89d5b7d8789f77294d3c5e8fcbe77fe071bbb. 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/BR6YG2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848894fe41e70fc1b26cee6081f57fcef8e3a50857d8bf42b7681c39fb97aa00. 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/BR6YG2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5860f881ec620802a5624f4bce21e741f05307a7a193759fdade09e3410fe471. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BR6YG2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52de7a1eb56fc64e50493a0366a6a3d29b4053b213427eff298f9e6a4255f71. 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/BR6YG2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f93b5d2b5d8a1ee968d3af18a827fdf66ef2a9d8b00ed82ec12e43828e053b. 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/BR6YG2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf333ff1d667792aa19944fd84535f0535f6bfcad434d42dec55551d4a752b2b0. 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/BR6YG2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017dc266ab6aebf4723f7d961ec9427471ea92f9d0a03514cb8eb5de32e70d25. 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/BR6YG2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9ebe65ecea0be889b593ff3f8bd0ccfb68aecfc6913d070545780ac4c9e8d5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BR6YG2400034.