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 0xd4b039543449a0b781a9c2991da5cbd67914157575b387565c1cca7646839e73. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d521468-3b93-4929-9ca2-37294b3dfbc4.json and https://artists.proofprofile.net/proofs/artist/8d521468-3b93-4929-9ca2-37294b3dfbc4.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 0x90c0694f4a29341d2a9503466e0becf5a00c386064354c65e36ea5fe18c8f206. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZJG52301313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c0694f4a29341d2a9503466e0becf5a00c386064354c65e36ea5fe18c8f206. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZJG52301313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e3a789222b910e4433b6f8949a5aa91f2d3b268d720ad4778fe358b9e3d4ed. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZRP52490226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6681b876de5aabf2ec387d7adefbf09d06c8cb5e0e430805a6128cc5f360d9cc. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZLBC2433697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4e873088a61a19112779a2a5d8d7e1138eb1631037ec7e7c676720e65462b0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:06:34Z), 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/QZLBC2502008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4eed23c12eb6b02d256ce866ab7d0b18cbc3e3b5cc6875c5cbb3e177ae4baf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZLBC2506599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d24938a96ef5c110f8877bbcc03d0625cf8e19bf89cb2a8837ce1b859f16908. 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/QZLBC2506602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c088880f56db3020cde7d95d891f0f1b59c3b99d45b2ff22151bbe5f2703b32. 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/QZEQU2501097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dca7ad0579fd0cc3e1893339d082aa9c1eb8a7be4a2de81336211b5abb42809. 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/QZLBC2508908.