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 0x537f700cbef91f952116a7cc799433eecccdbabf0ace4aa3f204f5fb70d8fad8. 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/734723bd-e8d9-4ec2-bfee-af333bc38099.json and https://artists.proofprofile.net/proofs/artist/734723bd-e8d9-4ec2-bfee-af333bc38099.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 0x212da313a34eb87129e1dec788aded50db02e473a19e7ee87d756035bb051285. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UST8K1611876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1312dd1e8f040f7adad7588110bc5c82c603750b8a3f2e08eee155ffe354654. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UST8K1611885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc10302b8fb3a9c1e00ab80171da1879a059df4c0c57bf1dab7e0c30d83e3ac2. 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/UST8K1611899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fb5185710ede687bc98313882ace5b033ef60f228a7a3667d290da5cab98f4. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/UST8K1612225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc49e0d9b38f26d9cba6017e30d9c3e2c00750baaf45b4222996423b270aab2. 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/UST8K1612319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0db58aaab9baa3c8d2e5f76a986adf69e1239ee37a934c29217838bb8388fe7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UST8K1615851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f65151608f20166c08e27c3ee2f3f68940c68243a5b1821c0ec8ea5ce0584e9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UST8K1615856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977c204a85e2df1ff53429bde03e2303eaad0fe705d2ddc80a29ef8d07b690a2. 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/UST8K1615868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb66d1af0e74779f9105a6a0d322092165615e78445736914cc4a74bbb232967. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UST8K1619074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56e8f0933e8976d166963fff5a4b4cc19226ed7fb2a411b1f6db35f8d6fd27e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UST8K1619082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799839cd23b256bc8ebc5438194c95d003f1d5f03d4feb204e85f92d117c5a5e. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/UST8K1618257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ac5c17b9454a5297dbe35c824c291e772a4642ab04ea64bc87188356e3e56c. 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/UST8K1618267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eddb4cb164d3a2093af511dc448c0cfaa765f7260599cb5d4be5b2e6464e881. 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/UST8K1618273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa362bb5d4474aa436b2147847cce4de4815dac2bf66d322a5353cc58cf39dced. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UST8K1619242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18279cc2e1ba9ab0d8faa37700532607b3de564f97599a1dd3ddf0d1dc38f62. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UST8K1619247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08327b9fae04288bc98e86dc4b3e7eede2ccdb0439786f85fa8fc8cfadb8d1c5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:04Z), 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/UST8K1619248.