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 0xd3430643eaa6c06bc7b28386567bb332b0acdaf20dd8e9d17a51189c71c0d4ee. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/978a8c06-ccd4-4fd5-a7be-b755252fffe3.json and https://artists.proofprofile.net/proofs/artist/978a8c06-ccd4-4fd5-a7be-b755252fffe3.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 0x6cec3ff3dd126c8aff609c2a74246fd9148a275dc3c7812048423588c2179476. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:11Z), 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/QZDA62463589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41afa5c931a8ddbeb3bbb4a03e04df9d9e5f03041559e0d286d86e93b1a3dfe2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES72479567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32486184397e0961ce58a550a746387e96da5c18c657efcc540988131e9b89ab. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:21:17Z), 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/QZHN62446336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f5d0c4d7b1121127e17d5032f77709ab4f50fcc6c0ff5d755589d80febb10a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZPLS2484025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa033e04b6b4a0c3a4160abea520e00db2eaf873d88757baf1eecb7b882655264. 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/QZTAZ2449723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c24066641023a7f6be5ec067b0f437b818bff7603baf3f7b63b5c5c7bc01b0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBF2489811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79dd4d2847dfda3660057af1204544fd76854fd15371b5c2185eeaba97e5bb3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFN2464026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b8f54a13f5b0b8c01d6dcb4ac5d5770ba84abdc88b5861ee4aa87a0ea2c312. 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/QZWFS2401986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c5a3f100a24b6857afd1c33c2a5d75f1466fcb519966a1cd4d5e9b772558ec. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:28:49Z), 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/QZWFT2478789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd825c849abd8001ba1f94c1bc8c316918e1ae69e429503ded692f0bd11a34b. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZZ7Q2441265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914bdee280b6c51ab41df4e7e7f6e4f85ebb775aed0edc525ea93a3e7bae3418. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYY2508186.