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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1815c58ab1707cf141c90a3dee0e1a77b54f4896aee080a6818b1377b74dce7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3173c85-96ee-4db1-b8ba-6239a931bda5.json and https://artists.proofprofile.net/proofs/artist/e3173c85-96ee-4db1-b8ba-6239a931bda5.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d77b9c8e9379da980d9c95e86d3f4bff0e3081ea99daa4b78106cd149a6f2d0. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TRBGV2200926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a3bbe3757ed6999738a3e63fa6affec1a2b7d228530df0623b6e21508cfc19. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TRCCK2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90d2f0fb62f96e40011701daebe0daad3223f0a1637370cc4f642570342466e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA052500775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ddba198a5c046103fc202417cd883a246f5e1a66e8725fe983d47f2cefc611. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA052500776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074c5530e867c5c30335071cc87aaa161f6651c93a870212e9cef40909278fd2. 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/DGA052500777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f39a0205ab2afc82412fb8283bda917cb5c5e1c6ea2b8aeef223d93b51f912e. 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/DGA052500778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfc4c89fe50a3c5f898860ec05f93cf75a0eb79724a1144718b8f3645f4e406. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/DGA052500779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624eccb1d244faeb062625fcc207e8456714c663dfc5d662da91ddf910b69ac5. 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/DGA052500780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16b1b99fc7639b98227a92d858a344d0ff1acb63e5ee4d9daee120c0b7f8438. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DGA052500781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb404c381fe0755311bb6a5e989e5fabe9f1e6647b7154bb22a786aa0f4caed5c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DGA052500782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976b67e97c493a7b98c3c018d5cccbaa0e28a3e961628eca87b56db0de73678e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/DGA052500783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd3fa8a7afccc4c7a2cc9f72d3986a3e46871555520691065571f6373f73a91. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA052500784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace0c9da513bf7bd55f556781ca74b1a951da87b390d80ab0b7eab737ae6ccf5. 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/DGA052500785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd889db66f9a61bbb0b69437a951ef28c5e7318ed6a896ceb905082078b4ed1e6. 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/DGA052500786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a82f0c33d00b51ba4063181f30cababe93dc631ee0a636ba9481c063a0246a1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA062502624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80d6e0175ec664177027b1e892131f84065320bc74d8c8629d4e69c44c1fd28. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DGA062508903.