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 0x2c9851bd4766879c95cf65b0c0e97a1a58c5beab7cda4c4f17634b8a4f70d413. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7d6ef70-e7e3-416f-b511-2f6c048832f4.json and https://artists.proofprofile.net/proofs/artist/e7d6ef70-e7e3-416f-b511-2f6c048832f4.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 0xdf9de0a0373d72b77ab6c29a441c72e9a7b9c0adb2011c596744d601ceaa646b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BGA471913682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b0bbb6d6238de315ca963eaedf22c9ba53b4ea65e2a20ac4c37db8530ea659. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BGA471913644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7e5c3befa1ce1ab035981c2360cf0c399c51007b38d0866efa6e1bc4cf7d69. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/BGA471913645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368aec49d753d0caff27f54e8ca8171ab913e04cc5e8f16d9a4eb326a444a357. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BGA471913646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb859511bdc14504b026f05f181079d7ea5518f40a005e11d9ed949c4cc97452d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BGA471913647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f5fdd6e045b914eca75f534c674a2348270cc245693727d8c4e98e10a1236b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/BGA471913649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d058295d0a27354d91c079318e3a4e0deb76a5461cfd2bf17d858682ede63c. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:52:54Z), 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/BGA471913650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660150f40bb4752a56a82f56a9a53e7e8912e97747f601e747ccbe0c9659853e. 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/BGA471913669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087d893b011604a2b897a80081f0097558981a96726f29a6f07f6cba0ff714a9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:58:11Z), 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/GX8LD2346265.