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 0xb27e770274d0a0cdcd0665825997a46b232ce8808a5df42563de73de076f7b4c. 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/a28ba73f-2575-4a22-a9d4-a6e77aed738b.json and https://artists.proofprofile.net/proofs/artist/a28ba73f-2575-4a22-a9d4-a6e77aed738b.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 0xdd6cf7d9a07b30c3cebf357f8a55d504ae6a9cf17744bac17ac954122fb132cd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CZZR42000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120d2711c5f791e8a0639ae0180c1dc47deca8ddc83b70ccb8ed1e62088ca1db. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CZZR42000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4619af6fa5391c1be56ba09311a15d75bceaa15a152115b6ba57f5b4b13f5c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZZR42000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdab82776f2494b2087360e431a6e5b4854696991d410481c574f216f76de4c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZZR42000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa664c4763a1bf72286bd961917054ae77ec34046bb92a4041ee60f83780f9783. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZZR42000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55912e5711b92ff9b339025e1d56a24fe5ab590e4dc9731b63e298b094ba478. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZZR42000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8705eefe03e436ffc0400fc1ae35e6309f7bda4b9c70899b5c28b92694269757. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZZR42000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fb2ccdf49b92598d04f98a590973360f0a912365a8a23ee98beedcdb9a69f0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZZR42000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8f35a78eef4454a07eade9ea37e12c044b697ce75785129d6d5371a36a3a3c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZZR42100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a66b80c08d200043f7a50e9384a17df736648a7f0b33248b1179bea6e639d6d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZZR42100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e216a58faecff53b9150486ceb52000ba458c7e13dfb11ab68bb5656adac68e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CZZR42100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0642f77e2343179b06d84678480431bc2e4bdbb21708d85448bb98da60a58527. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CZZR42200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b1a64bec9d1b60e3c440d4bed13a69d02f7a0eb44df41c41f5957a05b7ad69. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZZR42200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1773de79081670d4666b376feafc1608eb5e4638debb558c57fe85a47a6b7eaa. 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/CZZR42200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132584e27372e4a1e803bd1f0aecb89d737830db2e7a74adfcfa19de84adadc5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZZR42200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584f52239ad2b986ad2bfc979adf0c3003905f756873a2faa9d7c4451bf3a20d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZZR42200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9479807cb441d854bfc7a216c71f3206ce36e8b7511a9245141069df585cd410. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:01:07Z), 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/CZZR42200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fb2ccdf49b92598d04f98a590973360f0a912365a8a23ee98beedcdb9a69f0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CZZR42000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649881d31ccbcd4da868bdcab5343b2402f9db34144168e2f7b7a9f190f0126b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:12Z), 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/CZZR42300025.