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 0x9d58beb913204dea373e5ffdf9309f134d0a073774f5e02dcdb7bb4d5333ed44. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f741d3a-0b00-415f-aa75-2fe180f972aa.json and https://artists.proofprofile.net/proofs/artist/8f741d3a-0b00-415f-aa75-2fe180f972aa.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 0x3b925cb8cdc8ff8ceb6b5cb4b0d3b5a11b5f5366f30e970862d9483152b47a27. 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/QMDA62125137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af508994566ab76ef3bcfc29c890b06182d061d7a6529fa4f1c68c3d8805bf7. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QMDA62125139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8324eeb9ea520f11b52fa6ab04530e7edd06b93d1b3eebacda7db8f062373403. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QMDA62125142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091df2db5c149e97c55515b419ce74c2e08ee513f044a2ed83426c90bc0fb76c. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QMDA62180782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1f288592cd6c15e8b7e842974730e29abac28f5547dcc38b93b96aba59b0c6. 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/QM6MZ2302159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3290b53f1e5071e7c2f9251b871f9c45db07930547d396deac9591257168dcbd. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:40:18Z), 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/QM6MZ2302160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc59cccf6abe3cece9dc5c48a83ea8e2886a8cb77fd30daa231e4ae70056c1e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM6MZ2302156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42127d997fd5873b99c111362d1d850de4284ca3cb12339fb6ddbd8981f63263. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:21Z), 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/QM6MZ2302157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9121f39de24e9606a5830033e4c752110a46a7f7b6bfb715a69fed91be1067. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QM6MZ2302158.