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 0x949f98f70810cf1e3e113265e3dee99850938d7887b10351c5de7b2f7e4c1018. 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/47327e5f-e621-4b77-a369-7bf7d290cf55.json and https://artists.proofprofile.net/proofs/artist/47327e5f-e621-4b77-a369-7bf7d290cf55.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Barclays Music (feat. Eyeznpowa & Demorne Warren)
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 0x53c2b267873920111dc173507e3514c0ac7f88b2a8a4c91982bdb49d7e5e972b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TX1908858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b7302253a0c3e3865f6379987e155a7ecb3340ccdd018b8e28a88d1881b36f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWQ2017457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac800e8a05406510fd0635e0fb21a3396f1effb56594266b54a6b712b2954ac6. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZK6G2086473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6d5bdd069f0a645157ecece33fae06a82408dc1bd48bdddf3eb749179cc04e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZPLR2156132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea315e41c4c7c3a468087be50c254442f031cc3f92042b9cb6996745b1ab582. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEZC62146162.
Land of the Crooks (feat. Billy Danze, Maffew Ragazino & DJ Babu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68756cd866858b6138437149b7598ecdd85ec6094c922e5bc87e9a80adde59e. 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/QMDA71376854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32547f067808775636c071c39484c2038c112f09fd41107b76d010d39ee7f267. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZMZ92022000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32547f067808775636c071c39484c2038c112f09fd41107b76d010d39ee7f267. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZMZ92022000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe41c4aca8c472f385ca5be1f99338feb7e9b2f59d931bb76b2e6664d65c6996. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DELJ81350907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18729c75dd4097224d9673c2ed9d9ddcdb0e3ff5ef5073bfbef3c84069626d1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAGY2325433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141b77b0a18fde3f649c18d7ee81764adde14b68740787003703bef588ac0be1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAFP2142366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264b6ddcaef428363976c1ac18b7da3870b8d5a7c04c8a30e898762ce64ae45a. 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/TCAFM2119010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9022aef8458d1ae55fe144a28730c2d1eef5e6e21f12a79a298580b210e19e15. 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/QMHCW1305405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6887ad7138b1e4cbf240f06f0d1651b217e03a9b905dfdf936f5ed65c549c3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DELJ81468804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4180a7360535ec3d27226505646207f50caf2ac0302643fbf10221c4a269d40d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNJW2226752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb547512ee26cee5d81e98d1de23c4d7a32edca01cb9c2e1dfb18d2189e5212f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAHN2318412.