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 0x4a749616f26b7ecb185f44e30c38cc5db8aa5e482bc3deb9e92b1e8c1d760903. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/880f6b91-8758-49ac-b869-2720ab80c615.json and https://artists.proofprofile.net/proofs/artist/880f6b91-8758-49ac-b869-2720ab80c615.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 0x0f47847e9bda7c6755c607fc3fdd0157ad7961aead7a62dcc738d2b53ebd7a0c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SE5752379398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5f6c24ab02994b73f54df10a914af37da91eb10ffb70edff3b41196927d916. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX872377063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8e1a9b1907b7a1618c31764f8c7f6c1b5f3287fe7711ddb4c917d6871e7e83. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA0M2392009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28a5023a0fd3509653d0e14ac29c97c1ef0037ccdf2f24745dfa87ce99764a2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:57:34Z), 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/SE5BU2489515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b694c7eec0f504b1d4fb019ad740fdf2ed631e6b736efb5f8d12a1a714ae4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6HN2439335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8486524971471474dceb0bb10e0cb9fa5606669bf4e7da24582a21a41764885. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TRCFE2503521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712097ce357ae9d761305b22664c069b1c7603965a7d89296a51cea4c77cd744. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6H2585030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede99a51f06e2f51616b3239d102f3aaddab0b8c3a7e480fb3cc603eba12726a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHNB2521235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d314fb9f6c6556a58d1d21eb37742220091e836dec64f6ba39860f2ea458e28. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6H2585031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21828181462732b984e1f1418c1ae527b258becdfb098b7ae7c2f16cdec6fe86. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZK6H2585032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0629720a4f01d26d7e2ccd9363eadbddf779998dec9c327ae5cca01ba0e9c1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFE2522466.