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 0xf989bcb0b77b88fff8413ff22dd3a7050f9d004ae68a30a0162da37d649d29bd. 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/dca6812b-5c40-42fc-ba39-64d37fb8950a.json and https://artists.proofprofile.net/proofs/artist/dca6812b-5c40-42fc-ba39-64d37fb8950a.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 0xe2e232a6629b8ab4e615eb8852f9ad06f89f5e6a3bd92d422d83f2089cdad74c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USSM11702666.
Head Over Heels (feat. Nas) - No Rap Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4059bb2c321e3ec400b1a41f918dfff7d12b4c27ec5c099d044e3d85c3cef74. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USSM11702669.
Head Over Heels (feat. Nas) - Track Masters Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a332441a3b424a497cd3945457148e2136eb5ec45f8ea76da4e72be27790e0b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USSM11702671.
All Cried Out (The Hex Hector & Mark Morales Remixes) - EP
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfd9c76246f04a7fdd99f9b440d81c89c6594c248035bf7078a76efca4a30d5. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USSM19700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066ad3ec91f63d1390a7a40a9ec64153c849a7208cf51ce2c625c39969cf7230. 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/USSM19700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546d4b151edb9c6ed5c69022d68e16e4543ff87536d2cbb429024bd867d50391. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USSM19700172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63c30e809fa40d4d4492bd9cfd9de236a5cb7124eefdafb1a8973a188e109d4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USSM19700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c44dd1f301fb43d0aa1707049be98df35dc28ab76d1b39ddcb322a39587d4aa. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USSM19700170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2531b8bfc6baaf83925973a8b7334945b9e742d2685e292de33dc5f43b114e4a. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:53:40Z), 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/USSM19700173.
All Cried Out (Re-Recorded) [Sped Up] - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bc11655add20faa6f269ce5575f98e3204f714e2643894581ba46252cbc541. 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/USSM19700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bc11655add20faa6f269ce5575f98e3204f714e2643894581ba46252cbc541. 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/USSM19700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2375390d336de38837f21f894b13ea9b62d9ea1ee6e03619f9dca332c7225622. 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/QZTAU2229431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ef9a6e7892422902aa3f49f65a1a85e68ae21252d623022f7e6e13f51e6ef. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:43:58Z), 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/USSM19604421.