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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6e86db24aff7a3104fbe375cec8b11585181246f4b9fc4ad1b45cea919ef1d. 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/57ac60eb-4e5f-434e-9feb-e6294f62bfc2.json and https://artists.proofprofile.net/proofs/artist/57ac60eb-4e5f-434e-9feb-e6294f62bfc2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f09ed04fbce765f9d5945ca60796bf3847fe534d41571e2aec8af5d2d642dc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEP960207026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e24a00cc026faef60dfbb53b4b80f211488380775f2702d0d16fd3940c29cab. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEP960207027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f399e9405ed6e6a36ee338c1e38908a3426b5709dde4abbf588e3fce9ccc1eb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/UKACT2131898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0feceee2b088b9018c850702fa51c435ab8941fd6b81c745c19f8bf16977009. 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/DEG931190121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48817c7013f8de0808879e82cd296be3d1e61357ca8853a6b3885a922744631c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZLP00500329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ab4a5324839c3d1f7c3e21c0ac2d1177758042410ccd6a6e072a5cf5709f94. 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/UKACT2230723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e37146b47b947f461aeae67dcfb64332645c5deac40a156f7fb37b9341bb87. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEG931300428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9922e7841d86935bb1cda030631453271451d871cb0ff3328e1d65121aaa826. 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/DEG931300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650d0d79b5109aa8370aa63148eb8f89d52e744bb6828db99e1f4d1a3c53689a. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/DEG931300429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb4d6509e5268dc17c7ad642cad422887e459aed5b81843ec6b07b5edb9a5a8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEG931300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154776f14e63d2eb09c5125d13af06139a330fc818dc648703de07769f6f0665. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/NZRI11802103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f67c6e0e3664114d07b09697096e71ae46a3626df61ad5e75718a04f3461a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZRH10800158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e24a00cc026faef60dfbb53b4b80f211488380775f2702d0d16fd3940c29cab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEP960207027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9692ec1ceda64d66afd7a8c0ee22d81fde9692fa97ad7cf5ef749c6a3995d7cf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEP960800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c887c0dae6f2ca9a545013db23cc19cc43e1a8256c765307952d43887369ffe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEG930500375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc5f4dc05d727e13a5ebbf6cd139dd46c026810b74596c065d577999c9410f0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEG930500374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e37146b47b947f461aeae67dcfb64332645c5deac40a156f7fb37b9341bb87. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEG931300428.