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 0x3d5ca87f4c58a247aafc7cfb90fd7d0d12a8889dc3bcd62af70690aaf931d5cc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43e331d6-12a2-488e-8168-4afbbded51ac.json and https://artists.proofprofile.net/proofs/artist/43e331d6-12a2-488e-8168-4afbbded51ac.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 0x849bd8f3c5eefa861bf9b4d586bb3fc0053d03cb4e832826eac71a588c6bb028. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX3HH2164300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7047b2a008b8112ef0c3ec5514a3ed45fcf391ae7b816b20f4f248acd58f9449. 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/QZMEM2295389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2f5591413d27e9dcee0255410e4693efaf43b3fc654fa58fcde287c386a92c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWQ2251883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b554a436764f2b777b9620bfa62ee274f877a7885acb15da76eefaa22c1c30c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:37Z), 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/QZNWZ2228197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbe13161f55576c397ca68b577c4bd9792260f046579e8b072e94cad2aa5740. 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/QZRP42202855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedb765520cd43ed049b44e57f449d251cdb29ec8ffc9bedcd223ae20081a1c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6N2418647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c21c55ef1384533c6170cce30c0220981a7bba7b02490a28b2a4a0bc41f0ff. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:03Z), 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/QZNWQ2417750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e96d55fe3fd244b6dc4ffb697d11cd4f66ed8106c7cca71ec7d84c88abf52e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWR2435527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb168adf65910a117a43bb53f731c4bbb509a13dba68e645ccf9d8700f2d9a6e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFQ2459265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4615c7344231da344e7afa63f9fe9625ea072a5f0c9a3fecb92d1ac9f1f9e95. 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/FR9W12546145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc086bd16f1aae83b1fe1b4044f6141568957128947057bd16b5fb7e48f49af. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:49Z), 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/FR9W12548930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d44673211956574616736afbe4819ad09adf7da4eb609e0f46abc5002aaf2e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR9W12548931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc770a79b68a5ca31ed7de839bbdd4ee2faf03864b7364e1135dc62b09e060e68. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR9W12548932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fcd0c272670706eb75f4d30bef69f68829c75bf3a1f495c21aff8b9d49760d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8KD2423491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa342dcfaad1532311573146c74d1ab28791cbc0b158c026f69a73724efc504. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB2LD2210040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daa1319dd03268441a359a387ea7399455c0c705d97cbe2fd6f31ebd65039c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2210037.