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 0x90f4ff0be29a3a6b8c2e4f7f47168ba577171efd3a5cc592dc7f4f9a75ebda7d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e6173e4-96d9-4e02-b18d-9c5486552dd0.json and https://artists.proofprofile.net/proofs/artist/6e6173e4-96d9-4e02-b18d-9c5486552dd0.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 0xe5caca9fb7b7ff985fac3c7dce4fed81866f3dde9757e16504b3123d8cd346b4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFYX2090168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80897caae4e023d7da966508bac37e5b62e068a06e68e909f4fb6423053c1ca4. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:14Z), 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/QZZ7S2423895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80897caae4e023d7da966508bac37e5b62e068a06e68e909f4fb6423053c1ca4. 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/QZZ7S2423895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bac7492260a9b7a9434268ab3a72993f80aa3e519fbb0fc96adbe53cb6b6e6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7S2423896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bac7492260a9b7a9434268ab3a72993f80aa3e519fbb0fc96adbe53cb6b6e6. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZZ7S2423896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e76e87f47f29fb24e56c5bd6040d814be68b7afadacad0cc317f3f92d47d128. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7S2423897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8128ae0450ae5601b0c118b2ee872599538f5af16274b4b70fce9fe867fceb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7S2423898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab820d7f2d4feab19ba4e3c6b6a7ee6b88f6178b25ffd1d258f8abc09906d29. 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/QZZ7S2423899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7703b499cee3af2182f009feb27ea6438e91311d5fad97d002daca00157c826f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7S2423900.