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 0x4611ff3bcd4ebb5af509d613880c68887c451c8e8aeff683a5fb87e1c0f03828. 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/547b8ccf-3677-40bc-866e-d3885623969a.json and https://artists.proofprofile.net/proofs/artist/547b8ccf-3677-40bc-866e-d3885623969a.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 0x4881e12af9310bc04af548112aef18100e1436e616507fa25cfcfd902d8c6894. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNB82328688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65508a1c58ee826f1f5fb771f03670742b941e040a47549a857c0d69ea481870. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:37:03Z), 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/QZNB82328689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89daff36e3f8625e9c517b90f00406e11755e7ba06d82a02b4e70c3a60a9c62. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNMW2328557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e81e010bfee3bd80f3dc4f811668000a4a32f8d0ac85ce37d6da92641c045c8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNMU2301212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90054f6d272850340660f192854ee990ed06edc8098be703b95b355d797dbaa. 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/QZNMV2321410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb092eb0735114dae72000306be65ee96185aacd2fdd5f2f55da30a7f4e46ee2d. 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/USQX92406404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235bcff4cc7df697e39a6cbd5b359d6abf82058ba42d41da06bd028afb51063c. 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/QM24S2308289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcfeacda47b21e209e651a61ee9f6ce64b496014d4f9a8bff4e1743210103b0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:20:48Z), 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/QM24S2401241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35da9be23832f39574ac934424c6404ca1c299c788ae834fec04e6fd7e410d5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM24S2402517.