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 0x650bbe0da4c74e14c15addb26515c0b58ac450d0a4a4abed87db9b495d61971d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36073ca7-71c6-431a-b3a8-07a649954bce.json and https://artists.proofprofile.net/proofs/artist/36073ca7-71c6-431a-b3a8-07a649954bce.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 0x8d3c281b5dfba7d2a635f7de9fe03319f6106fef469f5f3f8cdc3382c8992bc8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAIW2481951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601dda709eba2db92835209c6b64303956d2d8a6aced0652d85c653f1b478f88. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:17Z), 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/TCAIX2479471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9f7d60eae2d35b8e589865426a2fb88422f7359068c809c1b2483ae2449909. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJA2408540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f48f49f9c7b1f222ee06efd5bc4510c94c9a267d1279e982be0a7f79a11935d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:44:07Z), 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/TCAJB2465351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e8146a87eacc1352797d11d7a3e2ecdd6fd2f629405e5df32c505dfafd12c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAJC2465311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2384793a927d44cf477f45b8d2587d041bc9df44e22fe0739f9c7efcdeb712. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAJF2565567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97767197b0c0058698140132b4b852b3f66abe4d27975235bc9322027b591d0f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:15:28Z), 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/TCAJF2565497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd67cf99983b8b6045263f74493cd8e6b9f13abffc293362a39bf191accf750d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJH2568765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccc22da4173fa5055fe30b0875bea6e0b66de281320c3cbef1a1db7da695d78. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJH2568817.