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 0x42b39a014bf47b631a6ff69d59815327b02ccbf8f7de036717e3f4f09f3bfbdd. 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/72ec25fd-3695-47cb-8d54-c35d0ca61d77.json and https://artists.proofprofile.net/proofs/artist/72ec25fd-3695-47cb-8d54-c35d0ca61d77.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 0xfb09107f9b673dec300015e4d6bda9b74d4622ab8f2b539c26b8249f0ba89e9f. 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/USMV29800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cee7e9046b50c88ac1cf73fcd5f28c917c181d05dcb0215f5c047f2a221058b. 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/USMV29800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3b4ada6180a5aace311cc25d32ea07295d4e31fdfc72f4298dc76921c40f93. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/USMV29800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7855ac7a282ae04f621fedaece104369a28c3ca107fa3501f8feb82647e7c65. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USMV20100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa3c1d61c9584fa12c2005314593bba6e8069bbb60bfb927905482dfb75aa10. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USMV20100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea99801b98ad06f25f82f5c19e416d589133bc57712a216f73fb6fe7892c6c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGJ1048001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe955d7cd08eb14e61efea917c7ab0bf6c6ca7f13f431bb319509a245c05b67cb. 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/USHM22081293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824d85d6d69ca8107db39cac78f3309481f5b79b271256efcf96a222300a5c4e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USWB19800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7413cdc4c60085809100dc27a8613ee0dbc50642e62b53ab0a39549f462b724. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI492014205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824d85d6d69ca8107db39cac78f3309481f5b79b271256efcf96a222300a5c4e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USWB19800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824d85d6d69ca8107db39cac78f3309481f5b79b271256efcf96a222300a5c4e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USWB19800170.