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 0x4082be31466d1d84b8b03a21e0c9eb653d27e41978e921c68de7948854df93a3. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fe04def-4fa1-416a-b730-a9f7311bd478.json and https://artists.proofprofile.net/proofs/artist/2fe04def-4fa1-416a-b730-a9f7311bd478.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 0x6e650b59297884e77d7a24d177095516c8a34aa74462708e488ff0a5aa53d7d1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DEAR41518151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dac2452f0e8e1e60f8691671672b2d37ad401d1cab4c1c9b249b58f2c5e611. 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/DEAR42436957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c0255ec0a884809898e720b16c4e57bf4914b1349e62e50ac64f878e5ee7ed. 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/DE1O62454932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd5f9775eef7cd2c474626e6fafa99ca4cb798129b2559679b5022219c83bc5. 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/DEAR42569130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8262b6ccd306e2b3badb1d5afdd83ee3bdae53cea2aa3aa6cf979fa47280ff. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEAR42569171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1fd6cc7dbe162d39cdb89c2dcd5512332e4c6bae5e2a0c45eb9f6c4953a148. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEAR42569124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19830c7f2b009e0bf6590db2c14b7aa26d78e3e12518d2b6a5061ea2936aad73. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEAR42569046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfee1ffcc87b1b7e61881ed61f81e20ad53884997c272a3d0e7e806201b5c92. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:05:13Z), 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/DEAR42521221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b5e96ed7bf317695b856df31b5b6fef911e9cbe45e6bc9f77a30bf0a8f820c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEAR42521266.