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 0xe1ba888d36f36b1b8da012663bfd132d6c06737ae970e0f118c0c4bf53c8064d. 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/c85eda95-50ed-49e4-9f2a-cbf229a79f04.json and https://artists.proofprofile.net/proofs/artist/c85eda95-50ed-49e4-9f2a-cbf229a79f04.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 0x869065ce54324ddc65d8b5049ae1812fc636ba54aa07873ddd8b0e2f5f7f3d00. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTB72254561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b237806c6e0abfbd3c9464dbd899ae98ba3ae35556b0dfbb86588ccf4ee86c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTAZ2378533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bdeb8fdae9931b6819213798f596ea5df17943ddc0fdacd6870fcd08c4fcba. 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/USLD91753078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c323dcc20501f05c465296d27753af83244f4d4cd8b8ab39eaf947e1888582. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USLD91753079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1bdb469592444d6136b37a97d738e35554241f93ab10e4fa3a79952439f884. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USLD91753384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dea174932ac41b6efe5c9d2d38a749ecdf0e4cd0a38c44b29c2d476d43fbf4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLD91754550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5217d27aa06a280eee45ff7986a540022f3d5fb0882c40182f196d8c0f56437f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:39Z), 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/USLD91754549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dc200441772f618f418bc998317de0e6a2d329f807db9559ff898882a2fc23. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/US3DF2413946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d76cdb4a0313370676ebc998ba00f5e2ff87bae41a0362beafc798aaf99ff6. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US3DF2413947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b70b53cfa6db4a37eb1dd68a17c048a52505654c8b444826fd7f8e87298bf11. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:38Z), 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/QZES92427725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b08a561c149035c0d406464d6c87cb719dc1c6845d0b43ad1afa168526d2bd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZRP52409363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca138a96175909cd244b02358d8d48d22957dab22b21c217829f94b3a32018e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFW2471891.