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 0xda072cd44e10e34fba171a9ad55d5ec9613c6e3e4d7532c470de3c063a8ce345. 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/daffa16c-8ee5-4ace-ade0-35bfc9117b7f.json and https://artists.proofprofile.net/proofs/artist/daffa16c-8ee5-4ace-ade0-35bfc9117b7f.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 0xd28a60fd9daf836652a2ed0da0eaff0ff2f635878aa673183f035f14407f4247. 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/TCADC1710083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d003549e757c677cd4d48a442efa663671e8569fbe2b1db4ba8de97192db62. 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/TCADC1710087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b10ed640b83c38bb06d4182abee30f84f4c16cf8f47dcedbff23ebf5a99e65. 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/TCADC1710091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac5c659ff8c7f5cd98d94850774eb36e4b2bd01d837d2089373ad6e23b23a23. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADC1710107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3837fbbbe92b3d5ce9c3258848be0776207a66098c81925fd03f87477fc8e800. 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/TCAGG2277920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb466b7946dbdd9e8d4235d6fe0537d6de974ff3a56807534bb1e4f6b0bf24. 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/TCADJ1756117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8782c3b7f6fb694f69838f61327d075cd455cc17c3f19f6acdc81cc7e5c86a. 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/TCADF1754113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce64cc7fc324dc614e499736543375ec39944ab2391690f844cca80803155ad1. 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/TCACQ1636638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff617ed9a765e6554ce2a161d8cd2781dca0e98b618d16bd66103a558a7c057. 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/TCACG1583984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76400f872c57fd9c71394a23502bfb0c6cee781390af4567f692737e300a4496. 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/TCACE1579720.
Forever Isn't Long Enough (feat. High Dive Heart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6c34c0bedfa0c9112fcd48815a0eabfe9b4ffec809c2ca0306efd908cae5c2. 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/TCACR1686373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f349f926020341cacfb3133a7a2588977bd5d53625a6e04eb66841165aed95. 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/TCACR1686375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3430d94ddfaa808dfa46fbf3ead1a50c087881c97ca1ad8b72c50437a8e5354. 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/TCACQ1671464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dbbe6eff082b52e22f9de7eee5cf569056b88821550e3611fe947e52de39c1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:27:19Z), 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/TCACL1695056.