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 0x260f0b47aa806a0a0d194cc46a0b8a9bb2fbe7710c5b9b7c19a8d1567fbf4457. 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/07af6f82-4933-4119-b4b6-52b70f1d6a82.json and https://artists.proofprofile.net/proofs/artist/07af6f82-4933-4119-b4b6-52b70f1d6a82.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 0x100eafc1cd173b2c68d0fc2067c1df9ef117b4a4ac1db600e0792cb03f6c359c. 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/FRPI62300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f3e8918f74f3f8f97abc37e570dec32ec86d51fa3fb2e84904b17fa482a0a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFP2360189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7531fddb47f1fcbe0c720f9c8c30c1300c1c17c6581222618f930c925a2fdb4f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRPI62300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100eafc1cd173b2c68d0fc2067c1df9ef117b4a4ac1db600e0792cb03f6c359c. 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/FRPI62300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc3e35cc12bf9ec703bc69de1469363b22715e53bf480e92c14f56c3df58b83. 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/FRPI62300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f6bbadc12d39072489dd7ab71a0a4aa92b0de67188df8ed95e9561e62b96e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR5301900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1d8ff508daf9fb673725dd4a9617af943ecbe47bfd72361df005abd4f5951c. 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/ZZOPM2239405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cfdd216dd728743b5fc6391877c626d6dae46fcf3febff75ac2de884b4a7b3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRPIN2000320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aeb08dca2919b75125c94b1110986d20e3218f7ec7f75bd1c88e16fc4f2333. 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/FRR641900578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb67c96425580f0856228a56902ac4a9838c15dc213494905fa3cf74bf3f9663. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRR641900640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ee4d7886d2665e4ec9636e585961569db3590b15d633e1824e83301b46dcc7. 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/FRR641900641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c7defb01ba135a29264d3ff828a084d91b8f84e4e8233bc71c4138c2a89317. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR641900642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe528ec71d7e8f691d12d3e66218dee977459687cd77763751a6889e57ab07644. 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/FRR641900643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d45ffa4c0f48a98ce993847a4b1761cf093c4a27936a9291617a0ca18130b7. 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/FRR641900644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf64d43e437045d1c34462877380f7a4f4b98ddfca1fa961815ceb241106437. 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/FRR641900645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b77d271c50293177eb5e459f8a00cfcc1be3947cc59dbb3b96eb9bd32a4a8a. 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/FRR641900646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d8b66594e454fc26867d2972fb23cfc7cdd3bec15ce5ce4188dc5aa430f7c5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR641900647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aeb08dca2919b75125c94b1110986d20e3218f7ec7f75bd1c88e16fc4f2333. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRR641900578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefdf3b4a986ed1e5408d970142d6e925377d6cb0c61c0e48defdb9eca0b567a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FRPI62300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aa192947d5c19d542829c6c5c9af7d7c6198defd62427b6638828ea3d11ed1. 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/FRPIN2300290.