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 0x6fcf45fa64088fbb3b96255d7af7119a9f82af766b77b0d6c10f29162447835d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ad7a350-d240-4551-919e-8993686291cc.json and https://artists.proofprofile.net/proofs/artist/9ad7a350-d240-4551-919e-8993686291cc.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 0x25be7c5ebf0907004bb6384625ec4736e636837067d3ed9d654756e1a846d526. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCACU1632595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e7d2fa036f23ebc0ede6ffcecec86e70f138c3babe29325d9fd6a3a0026c3a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCACU1632597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfefafd5cd22f684dee5151f10af74e7c8a7891fe6f1f08c6eedaf8530914697. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM6N21956721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c203596e92f65f18c4681f8d7029bddd11952693f7272438d4b0312c0c87d2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM6N21956722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29596dfe26f689f3cccdf806e581ea093a76b6ef9244d980f09fbaa7c3753887. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM6N21956724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65a6e627876bd2992fff19bd2d2da4c104f42b1a3912806686e8e06f5249e69. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6N21956725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02283d4d3795083dd309ec794f01835f3606668c8592fea2ebba33f5479e7c7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DES562210453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e478e7d4eb4b9aed956e8bc745fe6c485762f67381a42a36b527bba1c4a6fb. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:52:20Z), 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/DES562411522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf07b1529634555a4c65bbbb1078b9570f84ec58b3ae23593692a4087ce9ea6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DES562411523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b5f6dc5ad4dcaad520d1f9047e10239555cdc90bbdaf77c478c13decf2a493. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DES562411524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30353120af09b9634ff3827170094452c97750909993594f1ce88e4a36d10eb6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DES562411525.