Jonathan David Larson (February 4, 1960 – January 25, 1996) was an American composer, lyricist and playwright, most famous for writing the musicals Rent and Tick, Tick... Boom!, which explored the soc
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 0x39e7c034acb7c414f6dc3ec024d83c999fc9bfc0cebf68c7af7c3cbbbc9b3f5a. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b51e192f-c375-40c5-8f80-66de2143a9ee.json and https://artists.proofprofile.net/proofs/artist/b51e192f-c375-40c5-8f80-66de2143a9ee.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 0x3eb152e9c2e44d43f88936411970ea20d734c6a7ad5ca289efbfc04cd7579191. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/USB960775706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ea90f128ce2d7a0b2bb175321021258f67db1b0780a8d255f026f1bf904630. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:41:30Z), 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/USB960775707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2039d29709ba619ec04fa2c4bf989aecac4d8f408646b54870693a5572f67f61. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USB960775710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460c9851ec58b5921215fd02eae1172f05d7766ba96a2e9702059ffd4cbce9ee. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USB960775712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c7bf3b5889d1626d8f8d18431b579d3b8f71f04bd1563d179d7395fb7f7d94. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USB960775715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f7d6836b9fdeb8d77e4450cc3ec9584d608a270ab877f159fb05fe72743b9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USSK31996253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c765236cfaed61cde5067700929c69e181f5de8764c60dd192afac3e6a7566. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USSK31996254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548cd8dfde72543092c76bbf7474c96508d2b97cc6fcb6bb0e39e57e9c0d36b7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USSK31996256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e29dcbed87ee8c327831facc102850fadb203528bb8bccbf4331cb7d478e171. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USSK31996258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4a1bb7fb4407907014c6fed850ee8c5e1fd7438b1d30d6f03d0580fb5bec6c. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/USSK31996259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf658f22d586e94f7d54ad14b35ade423aa6b18d879a1e7bbdcd224e0260be3c. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/USSK31996260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dee06eac95c3489377bba5dcd33a0c4ba90326923dc40b9110ff3ef5d2f8c48. 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/USSK31996261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e4126ef4eb99ad08b708430e8431a81f1c09a358a5084ada336d840c3fda8a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:49:55Z), 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/USSK31996262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8f9204fcb21656d9af42e105f5f4b481503cb69c01256f871cb212f18a0415. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:35:46Z), 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/USSK31996263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f48268f779ac1dfb9b7f455b98e09f803e057120eaf3587a876662b16c7cea5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:07:37Z), 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/USSK31996264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8591c27f60aeced674ff5ce83d492111709ea927fc82f38d6dd799a14f99d57d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USSK31996266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5221a6983ad5c5aa738478912841a92968d47282ca76726f69fb50d1340e8c71. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:47:26Z), 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/USSK31996267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9030ba7e83276c18b63c4c3cc74376e15e8465d784b8fa4b61e24cc3f7da50. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USSK31996285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f27bcc9aac70abe8830081d666f660581a117e54997b9b688b3d7501eb50930. 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/QMBZ92080076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4305d2aeb78f155db2798829621833ac1f6c6a496b0cb73ccc701a449269c13a. 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/USSVU1051002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41391ae54796809c13403addce7d456608e4e14e1ca63dd85d158d6561336ace. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USUMC0000465.
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