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 0xd42f006ac6c1f4029b3a1ee2e385241d31110d9fb7638572afe7bf116c9fdabf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e7cd612-2b40-4dbf-88c9-9fc9b7fc7830.json and https://artists.proofprofile.net/proofs/artist/0e7cd612-2b40-4dbf-88c9-9fc9b7fc7830.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 0xf4fef1c20796fbae9ed4435be8cbb841284230991c1829ae407dd9b821294a68. 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/USY251671104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f34755a8a47d06ec94250ce9681a93a8e111c47224dc8080b291644577c6f1. 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/USY252141973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51c50fd06babe8732080fe1c430eeda5766de4e301f39d61d4e05eba4333e0a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:19:39Z), 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/USY252311144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e4e60f8cde3c0fb154d27d86670f869c3b3078c0cecef8fc9d589c33867d79. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:16:23Z), 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/USY252311147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf397c5c0b9a7f50a0a3a52e486d956cd5646fca89f7915c6ec06f82253bb517b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:25Z), 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/USY252311148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6d28364b9e9c37b8d1c056da0213201c7afe19c0bc8b1933d25486c86e1cd7. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USY252311150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cbb73d2be718022a1def13a551721dc10d47a7e81e10627ce604979ac5d1cb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:15:42Z), 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/USY252311154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882c0ebe80f27c2d9d75b1972056cd2427f9218d642e0b09ce1551c2ec6d1298. 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/DEZC62584923.