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 0xf25a3b8d39eeb67d01b94300440565f3d8c91104a0f0b3e77cfcc9edd801f588. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdd12b28-4686-4a83-abb3-9d724fe243ba.json and https://artists.proofprofile.net/proofs/artist/fdd12b28-4686-4a83-abb3-9d724fe243ba.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 0x94d550731369b70bb8dda6fe71c8da33c500b3311a81adf4f2a6fd33034b65f0. 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/US83Z2305936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8782daaaa7fe5b93b0ef2754a40284ed50bddd50481af0f481246b9784e6f3ed. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:26:05Z), 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/US83Z2305937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42682d6bf896b435e45b8278f7bdf1e2adb575aa96ee6895ae3f0a19f22a02e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US83Z2309682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f86141dcd8b81ad09dbbd3c2e7bd3659fa4c9101aefc17a99bf1ac7331497a. 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/US83Z2309683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8836bc581ee19a7faeaa983239835b52695da498411c8f32b6b87395b85581ae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US83Z2325081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4203f743edbce8ef8cfb4a3982302c017183ffa3a779fb96d4f776ecdf239681. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US83Z2337885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0a186d8361d1ef1af9e67f316d61ae84b325e36912694ae9e90dd28c178576. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:41:11Z), 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/US83Z2337886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07846c35e4f1f5e4e433f3417436c34c25a475cacc634158f8c0da066365650. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US83Z2337887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9adb8b38c1f4b744e52a062aadf70dbf01b3e9e1f2ddd0704d8516080fab17. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:01:06Z), 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/SGW502255079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46631b5f3e6b10ad1c5f4715c71edfdfce7ebc9f36e5e4a7fd8417930fc8e112. 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/SGB502564925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b01eebf060eb1f4a66f09420e85fd37aefbcca761d6b2641c80481938fb475. 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/US83Z2530899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155b72fbbfd65b0f607322c00707c227a6a19cb8016ebc78cd434d120753e635. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US83Z2530902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039271f8c1e53d5c9196edaed9d96ad1cbe2316596b99ed662a04401b11c46f4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US83Z2533688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a283c1eefd7911e6654bfd25fbf3d71c4c24d5458f5522014ceaeb539bb6418. 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/US83Z2533692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa647ef3663725527a12e8fc31a928a960560bcd22fc08074fc9d641b6cf97875. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US83Z2535337.