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 0xd2f428c8bd9edb5d8a5e37e694c16502b273c90dfbec5b33684bb27884635756. 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/4d3ca15f-003a-455d-9ad5-1d97029ab9a9.json and https://artists.proofprofile.net/proofs/artist/4d3ca15f-003a-455d-9ad5-1d97029ab9a9.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 0x89ad205d822d678901e0ac6accf33d29dabb33551acde69b39b3e31d075e3fb9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:49Z), 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/NZAM01902014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1d48ddcf6d4ef7cf8f27fedfdd49c7e45486b69e9b49aa0f9e92857de43fa5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NZAM01903628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac31e0bf45e1fc48fdc6fd0a18e26e4de55c22997d2cc8e4945dfa60936381. 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/NZAM02222623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1263bdd413edc5f559b7f83d8cb9182b6329b54e5c5829d39f638c8109640622. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:48:59Z), 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/NZAM02223968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc647b127e04113609cb2729fd3be60affa30985231bb46fb151639d2874c5b9f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NZAM02223970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4670c2214c316651cba80c5f4fd3ed17d296f7c44427efe6bb13bcbe0a1338b9. 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/NZAM02223971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8706e31e4e56d41d622f3faa4305bb0747746640b7cf723b3a606cc019636c84. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/NZAM02223973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff72b312cfaa1254a8061b01e15a360922e689d6af4cde93b15390279c27b4eb. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:41:48Z), 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/NZAM02223974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef317434941d082b677a4a072520bfa0055569f14d7c7d491381e958dc581df. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:48Z), 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/NZAM02224632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f14a0ce267c450962df51e23e0a1bc0830ea85cfc049e9c471ca6505e8092f8. 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/NZAM02224634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6b709ebc7e907428d3e57246070be679575fa9e303c94312f75d7836335768. 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/NZAM02224640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dfb837dff14351464763e6c9f9b329416520ea37bed29bcfcbe572af7c50b9. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/NZAM02400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820d7c49de1994dad9849433b4283b572c64e97f0d1cbfa8838c78bfd85f90a2. 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/QMFME2483095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3512f2f3199af160851b31bf5fe1f20d74c976c10d9477b9384196f84e415e05. 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/QMFME2483096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8607c55d328f473e063dc52e53a4f645d7fbec0d0ecd9a724759ab355ab2bf0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:29:50Z), 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/QMFME2483104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37570cf4a815c608b882f121f6665d9ce179403b1aa11e9793c5144672b7daed. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QMFME2483102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa907aebeb248387e1f8cc1b8d0825d5475d9381eab2a49f289b9a21e97a18cea. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFME2483099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21487ad3ae622d60195329495a0a6c2d5d4825a3a6b7b48b56d7021f7784716. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QM6N22545036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c1ccccf00805c95f42addcdeca0a35ba1f24580db1be27d16fe057038f894. 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/QMFME2543705.