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 0x13ac5920f0109072d6cbc689ebed00aa5f9b28da15b33bd225c6f5538c345557. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7372f61e-55ea-4ae7-b44d-57e2a84baad8.json and https://artists.proofprofile.net/proofs/artist/7372f61e-55ea-4ae7-b44d-57e2a84baad8.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 0xdf9375e8f74ae5121219f2d5ade3b184d3151bde1f92bb74ae96c999b2cd1f53. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZNWS2447662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240ef76feae3d353e9c2f8a41995fb0479cdc1d35b7b61d7e94b3a699fc9d679. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA52574326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01d5ee773479225b68732f7bcd6b1c9363f0c53e7f20ef8f65b04a1dcf49b52. 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/QZHN92574790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e5e6bc3efe1cafc45163469e9d1d277b0e7a0847ac7a1a5d11f916c82da26a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:10Z), 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/QZK6K2562609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57b9f85dacc6c13bcac04dba3262ea836a4376bdf6236fb8f0204cc9d679fc5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:23Z), 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/QZNWR2544631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37b3d0d818d8d03f46510c0e898eab941a2559ca02cd02428840aa63d31cfe3. 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/QZWFM2529142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb92d15ce6027312cd218267283e16b483a3559ceef9a804cc3d8c6cdc307ad5. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZWFT2571475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876d7b209f2e9496ddb874afc716c6b38616a631195e472a7ee8058373bb50e9. 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/QZWFT2571476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd542592891d33306516a82b766ad3095f6752817674e90c574aa9322db9e5bbf. 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/QZWFT2571477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2d98332563d46e3770766859a8de0f9c012b7c3697de23cc0fde0dfda79540. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:43Z), 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/QT3FB2579533.