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 0xb587149bf632ba308bbaedf6ae274a420505c57d25cae15786aebfd3f460bc47. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7775e8c0-86d8-4694-8f03-43584e4663bd.json and https://artists.proofprofile.net/proofs/artist/7775e8c0-86d8-4694-8f03-43584e4663bd.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 0x09e05638e9bb1e05d7cf18655a25aacc6675dbf97c45578e394823d8d3fbf5a4. 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/QZFZ22247221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef7e3030aacfab28f82bccfc6438e3719b52415c08054c714b3b68b69b84ec9. 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/QZNWR2271029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b13f3ceaef521c14932c1a3fd59d3cf26c32c11a2a633f8c703b330ff3ce3e4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:58:08Z), 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/QZNWR2271031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5372a2da1bf3e272135d8772f8d7a2cf3e7349d6a28188d5d34529e3192d12be. 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/QZNWR2271032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4da2ed50e9446d478e8c2b2ed6a73c1b942ef6ba3779291fbdd37c77cbf4962. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWR2271034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd99a21c4ab831824f7258a03c199fa57c93deb93462fcc717d40eeeadaf5ae. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNWR2271035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a288de534736ef469eb6ffc90cd9add8728691c520113908277f24fed43396. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZNWR2271036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebb94b6dd800f92be8a9cc2e86506e0567434118d1fb1480ae5070956bef351. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWR2271037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c5c687b3209af3c1b56b7152baed2fc62be88dd5d763f225ae486645d21c42. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNWR2271038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db0b97ea7f6f4b4b2df6560c48750e35ba5df2dc1f8ac5a4000897aed3c1630. 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/QZNWR2271039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf790ea419002085e99357ea7f810640f347bd7019d6a2fe8ab9bf16f560f4f40. 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/QZPLS2517524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe495ad92f72f57da99f3f50413dfca92bfd85b28fa1602ca9f14cee4f22db51e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFE2584096.