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 0xb521bd4db48eb29b2216712321c9a76d3943f259b346e9fd5cdd522786c9ce47. 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/5e835660-4db4-4e30-8288-f02e1be037c6.json and https://artists.proofprofile.net/proofs/artist/5e835660-4db4-4e30-8288-f02e1be037c6.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 0xb125c6e8d7380ef8036afe02639a9f6ce4c44bf9cfa79674871f302f5b21ed44. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA062369213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12a3945b9fd37cf952d120f70e5d3c66591c6268dea844bbe0d20c833158d41. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282347409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53b5af8db2294d4e80e8bef09b345813fbb2a7746c21cbeacab001bd3a112c5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX282308486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da7557fcb138c35f8fda2e6197d0b9d6b65da4b1b6618d4c66b1e8c3f8301f6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DGA072428791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6290067a1f0c4098438a1a942ac9de77baf75b0436cd3b40f4ad235fd820938. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0R2330678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985838a5aaa68333eb7ae9eb46e8428099c774a92e0f45c43ac41c8688bc7892. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DGA062374992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe568eb340226ede495c90458f1d83070c634e829cbb3d33ca6b809db04910649. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DGA072454477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ecad3405880c960f3a7ea39e8e4a18279dc665810c43adf6d1961475f095c0. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRX872439475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9608ea6eeedf76fa312301cdb248a8898ee633aed0c5b21caefa3d15b23c27e4. 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/DGA062442571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8a459da07239271f9aa8d562bd4eb81b5f7f0f933ea94ba08eb37cc092ac8d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRX762442062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8644c86399abd6a65d4180bc4b5d8b63f134af2c6a4b322bd55ca34f2ad42dbb. 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/FRX282446716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef5323a1c9f02100d6bb0ae74706e300d4ede2fcfd5e5e967ae00207f656cbb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX452478317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76983195bdb096b2262a298704e0d705970d4001f8f13f6bc227c0d99cf72c3d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR2X42456865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5620a431c43b13319a818411ef84394d8ad0c63c2b1c9801feee6f110cd3f6b4. 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/DGA0Q2366393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1d464737f1bd482ed323eab072bad8c930768af275292b7f5bacbce2429864. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0H2316477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f384117e854533f4ba3b1a4d084c76dcb11d61f4ac6a62fbe1b9d639597de84. 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/DGA0M2340798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d19b36b8d1b0eb7092d1d47a6afb7ab68ac7b2847bd410356381972bec1bc3. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/DGA092380052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce94002a74b6e96f939b298a86411c0f7db2f02015ee240c07921c97b132b58. 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/DGA0R2326922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2e7cf4189dd40d59f7a97f4bf63f4c934e4b6c650ece4c821bff9156cfcd9b. 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/DGA092393951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91efb32f5174da257b6faf68589a967fad8edfa558f25940e013f348e6e10116. 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/DGA072362163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee425e18dd40745d1a853a40894d1c496284f8cc4963dad81944d9193fec021. 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/FR96X2345957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856de3dce46b135161e0178c773b43b7de4d9c29d793dba05ae23357c83df58b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR96X2345959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d72520970d966f41a62d01c4df55956f0e415f68da248087dd85d3059ea3e2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG731766616.