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 0x918c8af36412733a17c59c99d92d28ccc952c654383ba0a1ca3f82470d58c20d. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a1db921-562c-405f-8e68-58a91a7199f0.json and https://artists.proofprofile.net/proofs/artist/4a1db921-562c-405f-8e68-58a91a7199f0.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 0x146ec33dae609d00b07d3f040255d44c566676d5eb9be77fb430a7625b2b9538. 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/QZFZ32588959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74de0145633c0b48c5692c1aba8c793a00ca09fa75da659f8cf29c509158cdb3. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:13Z), 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/QZDA62588920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94984d63d83256637e902dc7be3d7c7a262d8a0bbd0d6682ac3bfaff8ea43d1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZDA62591966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff876ed18d7d2bfa1ae908a1bd02ea5ec9a8f767dfdea83628c456c5316fbf8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA62588905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32248568c6eac2dfef22cac58f32471f4d057c442d21e49d26e910ed1e13ece5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES72528422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233fb748bc336ed970b78c1d6cf25361a864df0305f1b69e387264aaa271531. 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/QZHN42575078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2108883c9a40251fef23924b1c1100900c4e822108735c3a730c132404587977. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN42575074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd57fde5fe0c511d16fb7b2be81ba6e20c46833e8c6e88b95d07f454e25e9b8b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:30Z), 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/QZRP52510955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4c1163bad48a8a21f5e4e10a78da5bf49aa486027fc2d9edfb785f72b18ef8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAZ2532846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cf972fdc587b4c0d67a881ba048a71933755b7216b6d763c2a1d8041d6b0d3. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAZ2532847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0f3a4380b6d3ece0ac441f899f31097d57be4daafa48cc03a311638089f727. 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/QZTAZ2532848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06013302effaafd7752521dd26ef705fb33a1ff4e62fc5dcfc2cefbf5265eee8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7R2508910.