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 0x89ae46823634cf9dc505d15284b5e0e00953b20c2c10e803b1ff9bc49234d68a. 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/71469644-926c-43d7-9013-8ebd74f1788b.json and https://artists.proofprofile.net/proofs/artist/71469644-926c-43d7-9013-8ebd74f1788b.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 0xf788fff8945a15870e17e06ebc7e0e991dbf496ec73dbe42bad37003f81060f9. 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/QZPEW2204574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171a7b49f521f6954e202d3daa5d662b935b073be593d39f2dad1d8a82c129cf. 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/QZPEW2204571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901927a3d48392a9a3536a23890a4971b868b88e59541597d9c2019e96b9c0f8. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:24Z), 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/QZPEW2204573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a22013029c5455c71cb6182aed80fbaa6580768f93db9975ff7726d60a77b21. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPEW2204572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b54dc6fa012bd7d3f81a485c820c70f4b12b32baf3f40ce7501598a13ff9879. 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/QZPEW2204547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fa7717c936958f1cc3d8591b6b4722c2ea7d1dbcd03978333d513d07e7c13a. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZPEW2204570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada488048993d3c8d80dcd4bffd05c4c47f57eb9db8671732687f008d0da3a98. 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/QZK6Q2230338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc096ec5ec97d7703eb48ff35678854c0a57667b2596d66e197630c0d14d8a8d8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:43Z), 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/QZK6G2327200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed56bf806a9705b1f666db5f7abd5aad79e54c9623085b8f2896a448aaed25. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEN2390314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8dfd6b308e20899a1c5d33c5f9eede2cccef90d87955af1e8121822b7025ca. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZMEN2390315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac45facbee8bd83e8be0e8b7183f3f23b47a167f08e5b46a64efdead5d44d6b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMEN2390316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ec39fce0b621247ead748d34c63c644d2eff7deee77232dff08ab60e502689. 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/QZMEN2390317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bf0c89050707bb154bce4072fbf02da9a1ee46a2521f108d4f38a8a2c5cde4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:55Z), 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/QZMEN2390318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d4b3b6b89a934c5fde188c8f28490fffc25a74c2a9aefe1da7b02ee9cb361c. 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/QZPLS2316292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f5877c4e70200ff71606ef2cd94d745977f66dfe9419f8b4692be9c86bec42. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:01:55Z), 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/QZPLR2343838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ade1ca0d0229809c0b30434b40444ca08b4cb89f93dc38631f134c113147e. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZTB32384680.