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 0x85b6cf39a5011acd78c380371a853f0bcf687815b6be0a2759fed83797ac9efc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3de3aba0-a334-4801-baac-1688038a7e7e.json and https://artists.proofprofile.net/proofs/artist/3de3aba0-a334-4801-baac-1688038a7e7e.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 0x7ff90f2926cc7d68f153c3af86c44216d5e01f7be19e454cb70936ae364bcb3a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAEN1932188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fadc795b3a578d5f9a169a085f374ad444215903368a4e28f3e2c1d56a44d0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAEZ2082315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f41096bf0ff9fc5eee2a65a8e2ff1ba1494645c315b1bdd7172b13e6e7ba67. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:35:01Z), 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/TCAGG2260570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5565efa2809da881de5cd392e7b72352144dab508db31bd2c5f0c2556b9635. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZES92525147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f42751448f81e9ed337b2e7f8a84368b24a79687f2aa15b3a0ab4c9187bc2f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJX2572557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2561d6651f530bb73adcb4305ea21ae462acac1b4cd50f843456fbe652986823. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QT6622596578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d10fc88a1ba34b8fa199951d6dabeac8bfdced1e715ed120095e6ab9901a06. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT6622596579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0da766d95c7f03eab6599803221446378bc5c761c5823c7a4b5c2504002e69. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT6622596580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587e0b7b4b942d67c1e75ed9a2a3d11bc51ad8f03a737496b9aed9798798a99c. 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/QT6622596581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90274e27508ee11dc4c557e0756dd301f2684215077f03f827402c930fdff912. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT6622596582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ab6a331f79ad823d2741ee83159009d81295c0dfd5cf98b43bf2375003a716. 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/QT6622596583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3648c272481a0fe9f797a5816f7ec450a41588bbed187e65d164554a03f395. 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/QT6622596584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baff3a7d582e3aade8ffcf9853de230bfdd6fd161e58d407dcb37b49ed54a5c. 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/QT6622596585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5e8639a733c31a5cc04bcd15f596e65dc838e30997699a22cb5f2dfd372f92. 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/QT6622596586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c56a2eef5b03c2e1889a00f35c14d9b52aa733baa8926bd694f34365fe43d23. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:08:40Z), 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/TCAJF2576645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c3bcb7699493f415df29793c2d9aad6e25acd99702b491217d8dbdf33ff6d5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:55Z), 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/QT6622596588.