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 0x729e8e7b7094a98ac98ccd06bc47225625a61cebf1d0a6ae82bf0025edbdf847. 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/b301c35c-3a97-4237-a9a2-c231e8751944.json and https://artists.proofprofile.net/proofs/artist/b301c35c-3a97-4237-a9a2-c231e8751944.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 0x96a220025ebefe4d9fc9a653958842fb0043e0be25e6aeb8fc854c17f839825d. 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/CH7812402454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f18a746eee762661f3eea50e04c1828d2128a1bc527b968c1fae432897a2df. 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/DEKF22100801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc4f750de6c1dba9962a8aadb662131445d39842083d259dfa36aafcf6cf6b0. 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/DEKF22100803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d404a010797a4c53b0ac72490d30d16e9b09148cd81394abb52d8e5a87d480e. 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/DEKF22100804.
Tresenkraft (feat. Faut, Obi One & Flex62)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9bffedf9c5785f27978ffb4782041dcbc7d237843753311912c980df047796. 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/FRX452042477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bb6846fcd7a4e0d1a10685273e1693c4c1145da0df699b8581511858757f93. 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/DEZC62380412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9bffedf9c5785f27978ffb4782041dcbc7d237843753311912c980df047796. 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/FRX452042477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbf2005d9b5b97b0e2a4924a8ce824c7b76357de1dde7fd5d200785b520e79a. 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/CH7812346298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72de38bbbe3dc6960bf7ebab9c1848a255a45a5fb9af67b95a5a86cda649402a. 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/DEKF22100677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4691b778c71385a23f823f2e3e8c42e3b3835392bf4c4f2cc048af3216b62571. 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/DEKF22100678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf42affcac5cd52c37432209c82374c84c2e414e168120c7deaf2955f3698d8a. 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/DEKF22100680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ed6faab5a557bbf108bdce42f434a9866bf77891525f968bbdb081fe72c3ae. 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/DEKF22100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654bebdbb8e09654bb189ae657618f525dfe2223a1784849edb61fe386838f56. 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/CH7812355824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e085cf296cf52795b5cc0f4b91d1e26cbfaa310b43183bd5549e05874b3ed6. 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/CH7812355825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65659afd57fa1435c2ba35c1654ee250c6901ebc7933a882fe87f64869f9ba07. 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/CH7812354919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599a6b8c9a0852fbd8c4bd4ee99e836e3fedb35e7fae2a122ffe4d3506373921. 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/FRX202034249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4699feca22f7188008266fff1c36c734944f476111875b7b13d145f501b04594. 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/FR96X2053380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81efbfe772ac5061aa3a6530f32f2444d364b09d451c1baf74229e564ceaa3a. 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/FRX202034251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a635ed4555d9777a296b8d809fe39374663b3877927201c74fba7547682658. 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/FR96X2087892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1086316b7b1f96d1d8ebe73816fb616ecce680e2b32c440e06c3c8f776b11f7. 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/FRX202034254.