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 0x9b1adfa728f3488de4caa7fe8027e8078cb26936b8738cd06a3c61887e59ec18. 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/25154889-31e6-4c7e-942b-8bb4d152dec5.json and https://artists.proofprofile.net/proofs/artist/25154889-31e6-4c7e-942b-8bb4d152dec5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x9f68597a85bc31287379549195c7d59f58ae4b5fe6c9d26419fb13209fbc3701. 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/USA2P1567545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4580fd0be2f11e63c36d9e216639ff2b4fd88b5b3cc10ed9fba0675a3faf892b. 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/USQY51180839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c483fa769003c07e8c4192d8ea8c6146aaf84b6670fde9a4d9e95092f1067d. 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/USQY51180841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8809bf6d9b8d4d92618a5540e6e4044fec7a4622823da4e68104a86ea2e7b2ad. 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/USQY51180843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976324e89a4a8992571a1b838e174ff1ebc38361f24c4f8365d3039f844f3265. 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/USQY51180846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995ac73c26b6102c6b330d306fb0052905c1c1c5ee677c8782c426ef9b3126f9. 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/QZS1Z1616034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d66e046de1737e1a79fe1657f65de153f0e338d884501a9ad59c64a7acd384. 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/QZS1Z1616064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d571cd9cfdde8116dbc6869617648c59ce818e28febd9918bb51a9e6077a6c. 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/USLZJ2111737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965b9103439277034ec621aba4ad9868707b7e04feab6cf0e209f89ba9ee0fad. 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/USLZJ2111738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c4ca1afe7271c8d05df80b2c60d937ad7838671b9ddc1ad2dd0e906525347a. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:20:34Z), 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/USHM21855682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a0e2ff16e0ba235297b7c21d11e9b6e8c81f9e5c057c74485d8a53d579b067. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:09Z), 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/USHM21855683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd73b2d8456ff54a0730cecedeb10b55555435889fe7aab9c775de337e8c20f. 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/USDY41711555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70db131b0641c12fbeffa0117616ab9d759b23176d0ea0be25807077c69de1dd. 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/DEGA21650165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195069ec82f95867715ea927d67a3a14c02ca647fd1376825fa75df766e11581. 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/DEGA21650166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fd37118daba9fa6676e8226ce4ba51382a8d65b8b0f0fc208b3e650daecaf0. 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/DEGA21650167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c5cd9afccc4317d13a54c21fd0b9aa9408d6398363e6ef8060fe3df5f4682e. 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/DEGA21650170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539c10adef4788f7aec5b356b05d1694196b10d1e97e7c4cfcdbcfeafe0fbafc. 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/GBKQU2174011.
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