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 0x457ae7be69086e6664dac750a5555a37ebefd91b7cd5e75229cfafa28f0322f0. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78576aa0-ce2a-4690-bc92-be0d3fccfd6a.json and https://artists.proofprofile.net/proofs/artist/78576aa0-ce2a-4690-bc92-be0d3fccfd6a.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 0xa382b273601883748c178c0c57ebb95ef9dfcb6731c235f6ff05b6ef889cda8f. 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/US7SF1756534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166f3138603ff8e533725d80cf0d6d37810ffec0b443b19ed5c73b1438c581b0. 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/US7SF1756535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa143e5a0fee1518400498680920cc2fd755eba77192602842d0db3fded2391. 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/US7SF1756536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b1a8ee2fdd4465708541daa03561a21f17f04b4a28bbdd578bdf8a2cc1cff0. 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/US7SF1756537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b6b79e2357c1b8425af38e1c877dd7b388e7cc0d002fb5b69b571e824ae686. 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/US7SF1756538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b2308a30e4aeeecf28930d441723afdfcdc6c5dc830ba018654b6015af690f. 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/US7SF1756539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb488d95f48521d1dc5404b5e185a0efafa29b1d9585073b6378d2b4140bdbb85. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US7SF1756541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872f546006522803475283ac3e13f169deeb756686630754fdd04d267f2a1d16. 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/US7SF1756543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de73b98f73e58e8fcb65dd90124ce3f3dfe138030efdc428b19088d530b8667. 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/US7SF1756544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560670dd8735b2d6ba390a2a339a9a74c918caf389adc6197d16946787fc6ec0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US8JA2049001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c5516981dbb2507ca8871117c2771a7c6160b7d5025f2b5533855822d6a029. 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/US8JA2049002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf84b733f75ef516b0d3a839a4ad1ae3a4813d6547015d7af019d90241a77de8. 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/US8JA2027001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab78c5db48615c53892413f0f656b8f81e63d0de4f66239f15c81ff500791257. 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/US8JA2049005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44336950ea56f5173eb3b3ac23c37b890bdf877043e7b9568299e91023b6a43d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US8JA2049006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2058e4543032ac0b00b5ab9a3220c6a521cf673259f56eccf9228ed2a2d610bf. 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/US8JA2049008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc15c378596c4e01fc1743d38fa945e00646cf048e5b96acb0ecdcb23ca54ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US8JA2049013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a9fb2136a45f2f4e3e342ae062a642fd17552578048ba6bc9aea31f15977b1. 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/US8JA2085001.