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 0xa1535a3a1c0fe760697f6ce53f43dfe70ca10b7c0687b7b7bbc170d0e935b5f8. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/634e49b5-22d4-4b72-8e74-b1adb8c34eaf.json and https://artists.proofprofile.net/proofs/artist/634e49b5-22d4-4b72-8e74-b1adb8c34eaf.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 0x31640726aa7385d3c722aa087a97f535913f54e7e9b1f8d5eae399eb1e0e428c. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/RUA1D2559169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68dbff0fd38d33246e35e915de448546dc275fc6150a46bc0af38c6efbd15aa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUA1D2559170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f53fcf7c6e769026836713a8d3801ae650fa7724d9df15f8beab0aa6f3ba83. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/RUA1D2559171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ea4db356d4f804b1e9f0262a9145d9a9a097b83d8dfed97555dccd992e9d5. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:55Z), 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/RUA1D2559172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4b4203abfb0ddda39e57f97722e66f373e1c3851795ab2c6415cc6a2e8e0dc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/RUA1D2586940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6dfd3f63ed9388cfa74303c7b6374159697b4e470160b6a74e72a39182d6a8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUAGT2559955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55afef215ee213477723d25b524373c2f7fac610ada85f4b7e1f63010d7eb2d7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:43:51Z), 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/RUAGT2582633.