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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b62b7b3945caf1f9464f2636c4c0401b3e68b83dbf5864a2087c5a6c7eca325. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/891965b5-3a57-4dab-91de-7b2f95664340.json and https://artists.proofprofile.net/proofs/artist/891965b5-3a57-4dab-91de-7b2f95664340.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa477467c1a829df522ac96fdd7e922d79b8da447066b0b25544c73307ad9d9a5. 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/QZMWW2354698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684bcb42c12c0530070e5f69dc8ac49f9f8c419ef620994a8a50f937725eae2d. 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/QZNMW2223642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584f29ac4f686326ff345129544b04c022d40daccb9c591ad3c9902d0a938ec6. 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/QZNMW2223643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fa414c2b20c6fac0b1de28398e344c4ffc1ba1e78c1e5748abf61eb833df20. 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/QZNMW2223644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9df728b4a485788894bf318692a8afe75823828628b7c685d3e041041b93e95. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNMW2223645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2403de9db690436849bf233eeed02d8439ef927da1d3c581637f349b9a38e15. 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/QZNMW2223646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce980e0d6e5eb8a9defc472c848e3e0c2e7e09f7bd49cce7e3c68ddcbbc31661. 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/QZNMW2223647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1292bb4802aedcb715fe60cd76cc53bbcb178efb2fee67d974abc118ba78baa0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNMW2223648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f8dfe917f6fa2706321bb69fd86c2b3ecf43e6f5d21f99bcbb0918aec54bf9. 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/QZNMW2223649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0294b6d7c398f983df4ba19e38f87df29418cfeea559f0922f92a09272ac2a. 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/QZNMW2223650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28183dc28a1403903192a1c1bffde257d4c5b17b553fa2dd0f91ac1f92d59e02. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNMW2223651.
Its All About Party Music And Friendship
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7a4ea12b886615acc88f97430db2c61d5b0f9c0c718dd50de0008730cd01e0. 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/QZNMY2307773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a183198273707c92879787af3f8140ac2e3ef290806b8515c343596fd036ea. 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/QZNMY2307776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766b68554ec9f24a92259298eafebabaa770f4a5709327364a33bb1eed7132dd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNMY2231522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc6e61d847e1cc780c7ae42817fa228c86883a2fbf35f3a8252f79438db402e. 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/QZLL92367812.