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 0xd02204a628c5cda57806168305df02bb9e85d123a12c1aa9fdee273c59a9dc6a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea492514-749f-4877-8f1a-a4e891b9e0c9.json and https://artists.proofprofile.net/proofs/artist/ea492514-749f-4877-8f1a-a4e891b9e0c9.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 0x131d36e3731928875100bbb216be3811cde1e2c11dfac3aeedda79be25cf0963. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLD322400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe113243beeb1fe8655cd271a78686804270938a36e137614db908bed094a3547. 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/NLD322400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77fe3cfef8529d44adf2996e401251b3032747c25a5b50b49b19cc9d761ed8a. 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/NL8RL2404644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7130a633777ccd97bd933835f943b1354c76491def58421ada06a4fdf662deb. 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/NL8RL2404645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa437cc545bc8fd44343e6e30f3ca479346e297a9d1a94243c15987fbf18d47aa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2355542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce5c0db5806b97df62b798614fea53ad7b9efe71905d7fcdd118409db891154. 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/USA2P2330040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a6456ac5f954b40c6f44ca355bcdc707dba6b0b78eefdd875574820891dab8. 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/USA2P2321019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841e375ceb6fd22a5f26071dc962f753998081e70ce677f5e8b93cd4f68929e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe06a21f64251a30438cea9586c53e7e81990e62bd7ba407d73e042de9de35b. 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/NLQ8D2201345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067c48a4836e5def02be04bb6a96ed130fc1408837694d91f78c114897938636. 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/GBLLT2222642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37771739d61d684d9d77ee6cfe56edf16c5ef15a243db8d8ae06aad3699de08. 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/NLS242100571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf37840d0cd8af68e7094c3a298a29a1f6b887e69151d405892391becf801010. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLS242100254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dc41f92a87dd3bd644498e22404e8508ff6b3fc37031d6d59fa40ef6615d6d. 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/NLS242000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c0570e7fd9f7de381fa356112cec431fc0f24b35ae5b185ff2aba7476e46d8. 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/GBLLT1909196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e781d06f134d9e35c2b35cd16bfacad6a62138d8ebbaf35e2ec5039b0e2597e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLLT1903528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f10af9ddc95350ad7ea922341ef95f4793572d1e0f7049c0c945ce9421d8e65. 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/GBLLT1835193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aec29edcf7457d2b3e74237d399a4bd5911555ae089987ff2e19ff9a2613ad. 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/GBLLT1804322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06acc7628487f51363de339aa00c1fa808902e1fe29b04da54c72fe931513c22. 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/USHM91788318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20e0a30676b9e7171fbb278eb1ca3b6f0aec5a8b9cd50358b31e96b72d7f006. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDY41797471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccc4cf0d4b77ac99d0ce1b393b40d19c8987df3fdfb1514467e7238efb9dfb0. 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/USCGH1732799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fea904c34db74de54af75cd1573703309cf063f5176639319dda16f4ffb701. 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/NLD322500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d929fb008b6c0faa968e3aa734a913c657f7e74ba10918a7b234436768dd89. 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/NLD322400503.