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 0x4d8c9702cdb9775b98d57f29ec7c833e391ea2c60b17cb354ecec8c052093cd3. 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/73d5029b-f41f-4b8c-a250-0a14a1d2cf34.json and https://artists.proofprofile.net/proofs/artist/73d5029b-f41f-4b8c-a250-0a14a1d2cf34.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 0x85d3e5b73542f60c9cb3f2ebbbbe769ff4740a576825a2bb78e6bac5c743afc0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ62252615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abc9d07aa55de8503a922cf36c648ff69ee05828f6c17ee46b58c098b5832cc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6K2235342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50442875caff16aa12afe8667a51f5c594d4188b436217ac1c30e55eff726b7c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZMEM2207040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c228008268b67a81c34577852a350f04315d73410da15b66a2cca74e57b65a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZRP42218623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda48066415536f9db6805485fedd04b68cfb27f6b5f7ca2667266f4a6062bf38. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBB2270315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490bb12166494448d74d7b03fdd133172dacfd1a6968735108feea9ac4ab2d53. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZPLR2335122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1025523bf052c0bf74c44ac6f065ace2d056a16ba9b5726950225effde817d58. 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/QZTAX2301306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d69618c20cf3e11c45be81723a88c10765a98bd29d17fd0edc712d1fbef14f3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZVEM2368876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e9f414cc2d8ab1f4eb0190cbc805ca91fd1a4e2b14b0260869b7a185a90221. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:13Z), 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/QZPEW2453190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1638783a30133c395b3f7f507c793d7bc858e1d23ced08fe58dba951399ee9a9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TLVEM2484879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2077f0843f12549a604c281fd8f94405fc599c9b54d24bdb457390a687873b74. 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/QZPEW2519198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c14fb9b023e7ab63d755bded6ba0551c0ae6ad6cbf406b6dd29aa9fec338dc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:46Z), 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/QZPEW2519199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1638783a30133c395b3f7f507c793d7bc858e1d23ced08fe58dba951399ee9a9. 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/TLVEM2484879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3706efc0dac0dc57ba65c39446ef984d3677c833b820a0e0e2fb0979a5ecb537. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZPEW2519201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24c01e6fbb0f6e092acd660fdb77601cd0a0402c878d8ba5692c266e0fb6448. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:18:12Z), 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/QZPEW2519202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1228812e8fc819daac94184b2f71e2ce6d0683b8d8f4793c3e18b416c1540fc3. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZPEW2519203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e015e0e83480ff4843b38c477ca7e63acff9f05d732ab85e74c394f1d903cc. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZVEM2562985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134c904086cc298d3a1e9c2613c2a4c823ba7150edf1d5f78f11c59e160a835c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QT4K32511579.