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 0x3d592f8b58c103a48b4e592b058c9ca4316126d2b22bc8b1d7ecf06b23c7f828. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdc22538-02a8-497a-ad84-a3bb4abe8106.json and https://artists.proofprofile.net/proofs/artist/fdc22538-02a8-497a-ad84-a3bb4abe8106.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 0x77bce9ec6d937d352af75d496e8a412d2d8ac292ca6fdfa8f1fc7bed9ef3837c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTV32396804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a2289b62d8a86052187ba2728eedbaf020a3b4eac33d19368a2d3f6a3da719. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBWUL2422548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0205ef4863885aa037e3c024e39f9621068bebd73c46ad3936f572af3af5ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2405549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7e55261b4c3955bd4bdeff93115a467c8b2c98fa29ceb49f90c316754e3ee6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWDE2359427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5be7d7e362c1b04ff76fd693f4193f57342baa18371e4510c323ccf0b3bee2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWV32420724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053b83c7d5957ca2dc6b6cc03b81b76860b0f4b8e8ccf291d8a508f699b8f4a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWDD2498786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b097f5b3ac684857078164f5ec3b33161b21d2aa2ad418c7c4fd357089770a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWDD2432682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb6a9ebb14f9332480216770036844db8a5ca686fafcad1d83db8d6f56f1ef7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV62321018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539ce6f02b9411fc2c1ccbea999b8b86901372090a40f160206236a791f0e4c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62302314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4366f4d7c2805dd61b413f1b6999415be2a5f066d7a21c8fe9c44196e82fda59. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282361913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef55efb153e5b35049f833163e642ccb75de776567723ebddbf5142318f882bc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR96X2378633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25410293c300c0c8cc2cdef69e4fa663fa36f302dd55d0416826e561f939e684. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC2590189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d17fe3120093f58e42cfcc961a0f573d940d5ade818d4eea5fe6acf39cec540. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5FN2516610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95bf12a98b515b403919f4f2c23067b3cceba809ac574ed7de7bc5152837fb5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ8A2496613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143e77e18dcaf599dba4aa564122a2ad6d123ceb19ee2d55960df6b06175b3bf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ8A2483020.