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 0x2c1f084dc3f3a8e4b91c2afca9344ea50c404f3ff742acb0cd4a35592ec0f1d9. 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/ae1b22eb-67ef-4e22-a982-16b752c4f94e.json and https://artists.proofprofile.net/proofs/artist/ae1b22eb-67ef-4e22-a982-16b752c4f94e.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 0xd340ae9290ddcce93c54c9fc429f78b339cb0a2c84a0d4fb571fccd1f38af145. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4DW1747784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bc9d77f2c971471869a5dc63ffeb76c5d0fe6b17e261ff93ea87eba60cdef0. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM4DW1866203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0538503ebff90575fe272120d79ac6887f1b9cf7811dbd9b968c18f678ff9d49. 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/QZES61831908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff435ab7b878525a38b7216e413e2b0bba7b60733f2732a029166b8085895fe9. 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/QZFZ52055889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c5d7d64fc82085ee39e42e452d0f7878d8019debb97f6a48f48913f88d4e2c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFYX2158626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9a6066942395f22b79d22f03e849eb5e0bb82a0e2fe486c9c5eda408d6cb4a. 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/QZNWU2125561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55de00cf06825cd633f0894b377bd552ecc90b7dce04aa1eb4d67c9aeaccf11. 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/QZAKB2208654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d455b3d01f9f2d55d665a066bf81ac4979a672d7c3204c5ddda3777a3f5469. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZAKB2338732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccad7e6d5113d3d907b8cfa6cb8f61c6806263d62e466aec50f6d867fa0d4693. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZVEM2374319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4db1cf922267ffdccca1e106cb22b61a9e89bebb55461fbebd97874fae4233. 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/QZPEW2479559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38694ff4ecf6ed8e613aa115dd637fef6c6a9a85f87f7ead2633cec409acdcc5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QT2VB2424524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5623f6b149aa31c9585d928796004431e6ad567052ec3a8907c0d3e191cb778f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT4K42514057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a229823ee121039be1081610b4f7f55a977c22c422002302c9cce320497cda9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAWP81900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8864d02fcadd6825f72dcb674814fdcbcfd47af0570ecdd20e5c3db64644597. 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/ZAWP81900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29663e23088834ac5be468e78bb83433c71883e57786a206f614cc92204ec526. 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/ZAWP82300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05542c09d39b24708ed3a9ac4c5fae7187d6ce2d4804cc45eb910a387363be9b. 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/ZA0W02000005.