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 0x57cee8055debb4a8500413ad30c581a07c08d1bd55c2284753819dfbf5228e33. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecdd961a-fe5f-4345-b25d-acd3ca46baf6.json and https://artists.proofprofile.net/proofs/artist/ecdd961a-fe5f-4345-b25d-acd3ca46baf6.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 0x7da93ee9aadf1dbafed9a9c0f7ed5716680c45cab60574709d0e2913f158f337. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJY2331344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc176abe1869df311d6d28c79fa587b569234e34e00572fbab255b8d2a6d49064. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BK2NP2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7fa0627a4f84ab5839125dfcc362053e617a7b2f6415e3bb801cf47f48896a. 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/BCLWS2404344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bc91960e3144ca421de6d198344a724765e8a91ae932c1e9f92ea0c5bc832b. 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/BCLWS2404346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a5ecd93513d4f0aadaff571c24b71d399c6de2fd2ed63595e7dbf321dcddda. 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/BCLWS2404345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785cbe8ff7ee6aefd17cc3e937a99d6ef638f01e598e36ca18a0e0d818fe1897. 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/BCLWS2404347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a477e3fe427b12d7bebdaf42e961496a0ee23139afbaba6ea3a33f5f765feb7. 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/BCLWS2404348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb4114ffdfb0714fe39faf078d58242e1071e26af679bf1f738d325e2e8ea4d. 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/BCLWS2404349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb41edf76e60132e1ecfe2d6cd40b0288a16711405aaec86cadd9b3f2406243. 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/BCLWS2404350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d820c3b0bb25f9de2148f720abc144bea4f3f74d70f8746f58b0f934dbcdb2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:02:51Z), 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/BCLWS2404355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6b129882a8473b6ca213c6d343a1f7626de21d4efe633c7ecb4e3f00f0a3d3. 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/BCLWS2404351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1eacc0cbb7ffca11ab4a9c11b4458d2a56dd012947e2a87491068d9d5746b1. 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/BCLWS2404352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c88d806d555111bbf240fb56c92887f200179ecbd9b312f6733bb01f0185d7e. 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/BCLWS2404353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390484cc1fdef228a0dce65ade5813e338f7ed624e47cc983d5854dda51fe8dc. 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/BCLWS2404354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200ce6265e1102b8c1268a1bf21fcf497502b496cff847949ffce774f2b65c93. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BX4IU2418212.