thumb|upright=1.6|alt=Oil painting of medicine in the age of colonialism|The Doctor by Sir Luke Fildes (1891) Medicine is the science and practice of caring for patients, managing the diagnosis, progn
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 0xcdc65b0a07c4671d9975e6ec80d65e8715cb5044b9d7c4791981d2412faf550b. 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/25ff7694-0ee6-4e51-9c58-2e8ea4157f89.json and https://artists.proofprofile.net/proofs/artist/25ff7694-0ee6-4e51-9c58-2e8ea4157f89.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 0x012b0457d7c3d7b79be85af2824794c3418bcb1bafecab4b8c46408d21a364e6. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/MYNS11030781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582c408f9596e2aeb991cf6635c3f95205667b426d3688b0a459b0a9bc179855. 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/MYNS11536155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cdcd6489e04233fb462cce31d1bb25e59a8b7228d1f86840cc916a5cc748cc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYNS11030785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3649cdc38dd22505a27d489a2e53adf04c47e4c72a76cefea8412e10fae2b9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYNS11536156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb990e1d67f12ada1aeebe5bf712ce6047efcfb11985aaf1a890c29da572fce4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MYNS11030787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84219a14302a0c0681e1a760d8fe2d2c539977904b2e5b636e5152f8fdab4f39. 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/MYNS19530001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6ca48d3580d558306c3e373a2abb73cc684a304345754434c578f21f443876. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYNS11030782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84219a14302a0c0681e1a760d8fe2d2c539977904b2e5b636e5152f8fdab4f39. 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/MYNS19530001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bc587a5cc58fcf8c14406a6bea8ca6778d8df4a09b2d227d321dd9d4c82cd6. 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/MYNS11030779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15d88e048cc241635d815cfd425d4c368a68d1899f8e07f2f655acd504e435e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MYNS11030780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012b0457d7c3d7b79be85af2824794c3418bcb1bafecab4b8c46408d21a364e6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MYNS11030781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6ca48d3580d558306c3e373a2abb73cc684a304345754434c578f21f443876. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MYNS11030782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35567adbeeed2747bd07aa2cab5384f96239ce8884b93d3d0da0af51b33d409. 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/MYNS11030783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389e143a9236485eaf851ac715190cc2fe435bd5692f1cd2883e4bd7cda9c2ae. 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/MYNS11030784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cdcd6489e04233fb462cce31d1bb25e59a8b7228d1f86840cc916a5cc748cc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MYNS11030785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e3fa96639d928ca3687e2804bcebba5d4f64de61c0c4eee30977eae90024d9. 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/MYNS11030786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb990e1d67f12ada1aeebe5bf712ce6047efcfb11985aaf1a890c29da572fce4. 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/MYNS11030787.