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 0x5d5a4a7a36b12b93b22acacbf25548b351b30baa102a516af39b417c6d1cee84. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/926d456c-e5da-4581-bd9a-26ebb5acc93d.json and https://artists.proofprofile.net/proofs/artist/926d456c-e5da-4581-bd9a-26ebb5acc93d.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 0xf3af0c5244e245e1753168aacdd96115f444e99395b8f66b63337f646d99cff8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZTB62498771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f58523a040402d232f933f5e743927cb10e72fce94056dc4c36fe75922bdd90. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:03:54Z), 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/QZTB62498774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13e1aab85e05b9b2a423b1976d96a3bbd67f9020c751de11ea52c0f7810d757. 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/QZTB62498775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ed818ea3be09f2bbdce30744a54cf00d204214975b49d03a243cc088ed750f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTB82439593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4a247081363b7e48ea7783b40b667a1d41a19471afc59f7d311ee657b76833. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTB82439594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5696b6486f792031c7d165058d9f512381ab9fd169e5b17b5482bc893f76254. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTB82439595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41949a9030d8c10455feabe8bdcade2013965753aa854e797e86ab94a279e5e4. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZTB82439596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96310c2f9da5231aeb92b868a557ed355496be3eb8d00261e6e6d9a97292f9b0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:21Z), 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/QZTB82439597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a593c63f29660eb8172b406d6dc836cb72e453a0236643eb9f764e425ea896. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB82439598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb074515b2baf15fab9c0948d47a196cc7cbb2cecaf0342304ac32704e5c9b8ad. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZTB82439600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600a23c81c392d0814bc1c4f1763e9162129c8440b63cf20be55f0dd08f306ac. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTB82439601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5a5504f10e2e2cc9b57f6cf90965d556118baaa7ef577980d51d6ccf263c22. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB82439602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eb8d0a3b9f129f5e28d5ace133140c46e339013c074078267eaf0ff370d4d9. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZTB82439603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aecfe945e9cfd659a6791b1a09f3169b8b518ca0b319541f0c36784425ca8b. 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/QZTB82439610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11af43939d39514fb9b6a49e93714ff040528b90bf821ca3531c9a87738ebd5f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBF2419284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8946a7626fdd9a7ea748876189cd800e5cee9e810fd20b070ef1d28ebd6195ef. 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/QZFYY2591264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd544be83a2622c8e7fbc98040225c60671c98343f5af9f39820b6591fed997. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFZ62594045.