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 0x15631ac2f839bbc022484791163252855eee8dce17fc5a3fed64d8a010f29a0c. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01341448-c6bb-44e9-9384-486d78267397.json and https://artists.proofprofile.net/proofs/artist/01341448-c6bb-44e9-9384-486d78267397.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 0xe1cf4f8aa42f375151b67969537c80963092f1fe4dec53fb4d8d921707b201df. 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/FRS182070247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bb7f1480091703460da428130cee45d89e026259d4532d8d9034fee360eb1f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRS182070249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca7ceea3d2d44fa94ec0c63c7badb6dd9c31cc018216c4969e4c8b8ad6720f2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRS182070250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f339ec9190982dbd628ef34d65f346fb03f552a30ff71a21c2af7c6afd54f4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FRS182070252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09622c5f12e1dbeb9d41bc2f9396edea9a355701cfb3c08e4fe63a6b10e909c7. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/FRS182070256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b84c5f0e953768b62dd40d84f76a08ba5168db44254e33f8d8d425e85d8ae6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR96X2153118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731ebff44af05a3e852e4ef142c452cdd30358585e131dfffb045b9fd859ec98. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA072209660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8859afa8a9f8c5b1caaee0966ef26bd20a5ffb48bb0218ccd7d0d2c9ae7cf88. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNJY2424562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2163a53f721d4fa439e180517a6c12ec8fceb8c541230bc21483b85ac418c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2424563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4c9e2db27bbc898b12ec8c52887bf6a4c6cfe9551642d42162b55d57e4ebe2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2424564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5ce939aea75515bf2dd83ea78ae9cd2fddbad604f021e4a07c41bf3b2fb02f. 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/QZNJY2424568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64154a64f8f3e3b882266bede853d5a7e737616b139e28008beb7c2fcab932cf. 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/QZNJY2424566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34dd351d1094a4d0664ec42b4100962a819949e8a859332623cf2709921905f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJY2424567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be36a05b4da481fdb978bbb371510b2a1d1a9eb836191b69b3e4a97e24b0330. 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/QZNJY2424569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc518055f2e9a71c13bbecb04de1fc9e2d89dda08d8b9fe5a877d916e777d70d. 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/QZNJY2424570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448cb914997d016a2fabccbf155e5d8c03e192094db9b444d789b506fcf48fa5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNJY2424571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0174044c06253556a4cdffbd63b6da28c61414ffeb2961a19d0a961ec8bf2297. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNJY2424572.